3,704,924 Shares MONTPELIER RE HOLDINGS LTD. Common Shares, Par Value 1/6 cent Per Share UNDERWRITING AGREEMENT March 7, 2005

Execution Copy

3,704,924 Shares

MONTPELIER RE HOLDINGS LTD.

Common Shares, Par Value 1/6 cent Per Share

UNDERWRITING AGREEMENT

March 7, 2005

March 7, 2005

Goldman, Sachs & Co.
85 Broad Street
New York, New York 10004

Dear Sirs and Mesdames:

     Certain shareholders of Montpelier Re Holdings Ltd., a Bermuda corporation (the “Company”), named in Schedule I hereto (each a “Selling Shareholder” and collectively, the “Selling Shareholders”), severally propose to sell to Goldman, Sachs & Co. (the “Underwriter”) an aggregate of 3,704,924 of the Company’s common shares, par value 1/6 cent per share (the “Shares”), each Selling Shareholder selling the amount set forth opposite such Selling Shareholder’s name in Schedule I hereto. The outstanding common shares, par value 1/6 cent per share, of the Company are hereinafter referred to as the “Common Shares.”

     The Company has filed with the Securities and Exchange Commission (the “Commission”) a registration statement, including a prospectus, relating to the Shares and to certain other securities described therein. The registration statement as amended at the time it becomes effective, including the information (if any) deemed to be part of the registration statement at the time of effectiveness pursuant to Rule 430A under the Securities Act of 1933, as amended (the “Securities Act”), is hereinafter referred to as the “Registration Statement”; the prospectus in the form first used to confirm sales of Shares is hereinafter referred to as the “Prospectus” (including, in the case of all references to the Registration Statement or the Prospectus, documents incorporated therein by reference). The terms “supplement” and “amendment” or “amend” as used in this Agreement with respect to the Registration Statement or the Prospectus shall include all documents subsequently filed by the Company with the Commission pursuant to the Securities Exchange Act of 1934, as amended (the “Exchange Act”), that are deemed to be incorporated by reference in the Prospectus. If the Company has filed an abbreviated registration statement to register additional Common Shares pursuant to Rule 462(b) under the Securities Act (the “Rule 462 Registration Statement”), then any reference herein to the term “Registration Statement” shall be deemed to include such Rule 462 Registration Statement.

     1.   Representations and Warranties of the Company.    The Company represents and warrants to, and agrees with, the Underwriter and each of the Selling Shareholders that:

     (a)   The Registration Statement has become effective; no stop order suspending the effectiveness of the Registration Statement is in effect, and no proceedings for such purpose are pending before or threatened by the Commission.

     (b)   (i) Each document, if any, filed or to be filed pursuant to the Exchange Act and incorporated by reference in the Prospectus complied or will comply when so filed in all material respects with the Exchange Act and the applicable rules and regulations of

the Commission thereunder, (ii) the Registration Statement, when it became effective, did not contain and, as amended or supplemented, if applicable, will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading, (iii) the Registration Statement and the Prospectus comply and, as amended or supplemented, if applicable, will comply in all material respects with the Securities Act and the applicable rules and regulations of the Commission thereunder and (iv) the Prospectus does not contain and, as amended or supplemented, if applicable, will not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, except that the representations and warranties set forth in this paragraph do not apply to statements or omissions in the Registration Statement or the Prospectus based upon information relating to the Underwriter furnished to the Company in writing by the Underwriter expressly for use therein.

     (c)   PricewaterhouseCoopers, whose report is included or incorporated by reference in the Prospectus, is an independent certified public accountant with respect to the Company and its combined subsidiaries within the meaning of the Securities Act and the rules and regulations adopted by the Commission thereunder. The financial statements of the Company and its combined subsidiaries (including the related notes and supporting schedules) included in the Registration Statement and the Prospectus present fairly in all material respects the financial condition, results of operations and cash flows of the entities purported to be shown thereby at the dates and for the periods indicated and have been prepared in accordance with United States generally accepted accounting principles applied on a consistent basis throughout the periods indicated and conform in all material respects with the rules and regulations adopted by the Commission under the Securities Act; and the supporting schedules included in the Registration Statement present fairly in all materials respects the information required to be stated therein.

     (d)   The Company has been duly organized or formed and is validly existing in good standing (including as an exempted company) under the laws of the jurisdiction of its organization or formation, with full power and authority to own, lease and operate its properties and conduct its business as described in the Prospectus and to enter into and perform its obligations under this Agreement; and the Company is duly qualified to do business as described in the Prospectus and is in good standing in each jurisdiction in which the character of the business conducted by it or the location of the properties owned, leased or operated by it make such qualification necessary, except to the extent that the failure to be so qualified or be in good standing would not have a material adverse effect on the condition (financial or otherwise), results of operations, business or prospects of the Company and its consolidated subsidiaries, taken as a whole (a “Material Adverse Effect”).

     (e)   Montpelier Reinsurance Ltd. (“Montpelier Re”) and Montpelier Marketing Services (UK) Ltd. (the “Designated Subsidiaries”) have been duly organized or formed and are validly existing in good standing (including, in the case of Montpelier Re, as an exempted company) under the laws of the jurisdictions of their organization or formation, with full power and authority to own, lease and operate their

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properties and conduct their businesses as described in the Prospectus; and the Designated Subsidiaries are duly qualified to do business as described in the Prospectus and are in good standing in each jurisdiction in which the character of the business conducted by them or the location of the properties owned, leased or operated by them make such qualification necessary, except to the extent that the failure to be so qualified or be in good standing would not have a Material Adverse Effect. Except for Montpelier Holdings (Barbados) SRL and Montpelier Agency Ltd., all of which are immaterial and are not “significant subsidiaries” of the Company as that term is defined in Rule 1-02(w) of Regulation S-X of the rules and regulations of the Commission under the Securities Act, the Designated Subsidiaries are the only subsidiaries of the Company.

     (f)   The capitalization of the Company as of December 31, 2004 conforms in all material respects to the description thereof in the Prospectus. All of the outstanding common shares of the Company and each Designated Subsidiary of the Company have been duly authorized and validly issued and are fully paid and nonassessable. All of the outstanding common shares of each Designated Subsidiary of the Company are owned directly or indirectly by the Company free and clear of any claim, lien, encumbrance, security interest, restriction upon voting or transfer, preemptive rights or any other claim of any third party.

     (g)   Except as described in or contemplated by the Registration Statement and the Prospectus (exclusive of any amendments or supplements thereto subsequent to the date of this Agreement), since the respective dates as of which information is given in the Prospectus (i) there has not been any event or development that has had or would reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect and (ii) there has not been any material change in the long-term debt of the Company and its consolidated subsidiaries taken as a whole.

     (h)   None of (i) the execution or delivery hereof by the Company, (ii) the consummation of the transactions contemplated hereby or (iii) compliance by the Company with all of the provisions of this Agreement, (A) will result in a breach or violation of, or constitute a default under, the memorandum of association, amended and restated bye-laws or other governing documents of the Company or any of the Designated Subsidiaries, (B) will result in a breach or violation of, or constitute a default under, any agreement, indenture or other instrument to which the Company or any of the Designated Subsidiaries is a party or by which any of them is bound, or to which any of their properties is subject, (C) will result in a violation of any law, rule, administrative regulation or decree of any court, or any governmental agency or body having jurisdiction over the Company, the Designated Subsidiaries or any of their respective properties, or (D) will result in the creation or imposition of any lien, charge, claim or encumbrance upon any property or asset of the Company, or any Designated Subsidiary except (other than with respect to clause (A)), as would not have, individually or in the aggregate, a Material Adverse Effect. Except for permits, consents, approvals and similar authorizations required by the securities or “Blue Sky” or insurance securities laws of certain jurisdictions in connection with the offer and sale of the Shares, the filing of the Prospectus under the Bermuda Companies Act 1981 in connection with the offer and sale of the Shares and permits, consents, approvals and authorizations which have been

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obtained, no permit, consent, approval, authorization or order of any court, governmental agency or body or financial institution is required in connection with the consummation of the transactions contemplated by this Agreement.

     (i)   This Agreement has been duly authorized, executed and delivered by the Company.

     (j)   None of the Company or any of its Designated Subsidiaries (i) is in violation of its memorandum of association or amended and restated bye-laws or articles of association or other governing documents, (ii) is in default and no event has occurred which, with notice or lapse of time or both, would constitute such a default, in the due performance or observance of any term, covenant or condition contained in any agreement, indenture or other instrument to which it is a party or by which it is bound or to which any of its properties is subject, except for any such defaults that would not, individually or in the aggregate, have a Material Adverse Effect, or (iii) is in violation of any insurance law or insurance regulation to which it or its property is subject, except for any such violations that would not, individually or in the aggregate, have a Material Adverse Effect.

     (k)   On the date hereof and on the Closing Date, each of the Company and Montpelier Re is and will be solvent and able to pay its liabilities as they become due.

     (l)   The Common Shares (including the Shares to be sold by the Selling Shareholders) outstanding have been duly and validly authorized and are validly issued, fully paid and non-assessable. The authorized capital stock of the Company conforms in all material respects to the description thereof in the Registration Statement and the Prospectus. Neither the filing of the Registration Statement nor the offering or sale of the Shares as contemplated by this Agreement gives rise to any rights, other than those that have been duly waived or satisfied, for or relating to the registration of any securities of the Company.

     (m)   There are no contracts or other documents that are required to be described in the Prospectus or to be filed as exhibits to the Registration Statement, as the case may be, that have not been described in the Prospectus or filed as exhibits to the Registration Statement, as the case may be.

     (n)   There is no litigation or governmental proceeding pending or, to the knowledge of the Company, threatened to which the Company or any of the Designated Subsidiaries is a party or to which any property of the Company or any of the Designated Subsidiaries is subject that could reasonably be expected to result, individually or in the aggregate, in a Material Adverse Effect, or which is required to be disclosed in the Prospectus or the Registration Statement and is not so disclosed.

     (o)   Each of the Company and the Designated Subsidiaries has (i) all licenses, certificates, permits, authorizations, approvals, franchises and other rights from, and has filed all reports, documents and other information required to be filed pursuant to the applicable laws of Bermuda and other relevant jurisdictions as is necessary to engage in

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the business currently conducted by it in the manner described in the Prospectus (each, an “Authorization”), except where the failure, individually or in the aggregate, to file such report, document or information would not have a Material Adverse Effect, (ii) fulfilled and performed all obligations necessary to maintain each Authorization, except where the failure to fulfill or perform such obligation, individually or in the aggregate, would not have a Material Adverse Effect and (iii) no knowledge of any threatened action, suit, proceeding or investigation that would reasonably be expected to result in the revocation, termination or suspension of any Authorization. All such Authorizations are valid and in full force and effect and the Company and the Designated Subsidiaries are in compliance in all material respects with the terms and conditions of all such Authorizations and with the rules and regulations of the regulatory authorities having jurisdiction with respect thereto, except where the failure to comply, individually or in the aggregate, would not have a Material Adverse Effect. The Company has not received any order or decree from any insurance regulatory agency or body impairing, restricting or prohibiting the payment of dividends by any Designated Subsidiary to its parent.

     (p)   The Company has no knowledge of any threatened or pending downgrading of Montpelier Re’s claims-paying ability rating or financial strength rating or of any rating of securities of the Company or any Designated Subsidiary by A.M. Best Company, Moody’s Investors Service or Standard & Poor’s Rating Services, the only “nationally recognized statistical rating organizations,” as such term is defined for purposes of Rule 463(g)(2) under the Securities Act, which currently have publicly released a rating of the claims-paying ability or financial strength or securities of the Company or any Designated Subsidiary.

     (q)   The Shares have been approved for listing on the New York Stock Exchange.

     (r)   The Company and the Designated Subsidiaries maintain a system of internal accounting controls sufficient to provide reasonable assurance that (i) transactions are executed in accordance with management’s general or specific authorizations; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with generally accepted accounting principles and to maintain asset accountability; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; and (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

     (s)   Each preliminary prospectus filed as part of the Registration Statement as originally filed or as part of any amendment thereto, or filed pursuant to Rule 424 under the Securities Act, complied when so filed in all material respects with the Securities Act and the applicable rules and regulations of the Commission thereunder.

     (t)   The Company is not required to register as an “investment company” as such term is defined in the Investment Company Act of 1940, as amended.

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     (u)   None of the Underwriter or any subsequent purchasers of the Shares (other than purchasers resident in Bermuda for Bermuda exchange control purposes) is subject to any stamp duty, excise or similar tax imposed in Bermuda in connection with the offering, sale or purchase of the Shares.

     (v)   There are no currency exchange control laws or withholding taxes of Bermuda that would be applicable to the payment of dividends on the Shares by the Company (other than to residents of Bermuda for Bermuda exchange control purposes).

     2.   Representations, Warranties and Agreements of the Selling Shareholders.   Each Selling Shareholder represents and warrants to and agrees with the Underwriter that:

     (a)   This Agreement has been duly authorized, executed and delivered by or on behalf of such Selling Shareholder.

     (b)   The execution and delivery by such Selling Shareholder of, and the performance by such Selling Shareholder of its obligations under, this Agreement will not contravene any provision of law applicable to such Selling Shareholder, or the certificate of incorporation or bylaws of such Selling Shareholder (if such Selling Shareholder is a corporation), or any agreement or other instrument binding upon such Selling Shareholder or any judgment, order or decree of any governmental body, agency or court having jurisdiction over such Selling Shareholder, except for any contraventions of an agreement, instrument, judgment, order or decree which would not, individually or in the aggregate, adversely affect such Selling Shareholder’s ability to fulfill its obligations under and consummate the transactions contemplated by this Agreement, and no consent, approval, authorization or order of, or qualification with, any governmental body or agency is required for the performance by such Selling Shareholder of its obligations under this Agreement, except such as may be required under the Securities Act, pursuant to the rules of the National Association of Securities Dealers, Inc. or by the securities or Blue Sky laws of the various states in connection with the offer and sale of the Shares.

     (c)   Such Selling Shareholder has, or with respect to Selling Shareholders established in the Netherlands Antilles or the Netherlands, as applicable, one or more of their general partners or, as applicable, all general partners have, and on the Closing Date will have, valid title to, or a valid “security entitlement” within the meaning of Section 8-501 of the New York Uniform Commercial Code in respect of, the Shares to be sold by such Selling Shareholder free and clear of all security interests, claims, liens, equities or other encumbrances and the legal right and power, and all authorization and approval required by law, to sell, transfer and deliver the Shares to be sold by such Selling Shareholder or a security entitlement in respect of such Shares.

     (d)   Upon payment for the Shares to be sold by such Selling Shareholder pursuant to this Agreement, delivery of such Shares, as directed by the Underwriter, to Cede & Co. (“Cede”) or such other nominee as may be designated by The Depository Trust Company (“DTC”), registration of such Shares in the name of Cede or such other nominee and the crediting of such Shares on the books of DTC to the securities account

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of the Underwriter (assuming that neither DTC nor the Underwriter has notice of any adverse claim (within the meaning of Section 8-105 of the New York Uniform Commercial Code (the “UCC”)) to such Shares), (A) DTC shall be a “protected purchaser” of such Shares within the meaning of Section 8-303 of the UCC, (B) under Section 8-501 of the UCC, the Underwriter will acquire a valid security entitlement in respect of such Shares and (C) no action based on any “adverse claim”, within the meaning of Section 8-102 of the UCC, to such Shares may be successfully asserted against the Underwriter with respect to such security entitlement; for purposes of this representation, such Selling Shareholder may assume that when such payment, delivery and crediting occur, (x) such Shares will have been registered in the name of Cede or another nominee designated by DTC, in each case on the Company’s share registry in accordance with its certificate of incorporation, bylaws and applicable law, (y) DTC will be registered as a “clearing corporation” within the meaning of Section 8-102 of the UCC and (z) appropriate entries to the account of the Underwriter on the records of DTC will have been made pursuant to the UCC.

     (e)   The Registration Statement, when it became effective, did not contain and, as amended or supplemented, if applicable, will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading, and the Prospectus does not contain and, as amended or supplemented, if applicable, will not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the representations and warranties set forth in this paragraph 2(e) are limited to statements or omissions made in reliance upon information relating to such Selling Shareholder furnished to the Company in writing by such Selling Shareholder expressly for use in the Registration Statement, the Prospectus or any amendments or supplements thereto, it being understood and agreed that the only such information furnished by any such Selling Shareholder consists of the information about such Selling Shareholder under the caption “Selling Shareholders” in the Prospectus.

     (f)   Each Selling Shareholder shall pay all of its costs and expenses, including fees and disbursements of its counsel and any stock transfer taxes payable on the sale of its shares to the Underwriter.

     3.   Agreements to Sell and Purchase.   Each of the Selling Shareholders severally and not jointly hereby agrees to sell to the Underwriter, and the Underwriter, upon the basis of the representations and warranties herein contained, but subject to the conditions hereinafter stated, agrees to purchase from such Selling Shareholder at $41.80 per share (the “Purchase Price”) the number of Shares to be sold by such Selling Shareholder.

     4.   Intentionally Left Blank

     5.   Payment and Delivery. Payment for the Shares to be sold by each Selling Shareholder shall be made to the accounts specified by the Selling Shareholders in Federal or other funds immediately available in New York City against delivery of such Shares for the account of the Underwriter at 10:00 a.m., New York City time, on March 10, 2005 or at such

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other time on the same or such other date, not later than March 17, 2005, as shall be designated in writing by you. The date and time of such payment are referred to as the “Closing Date.”

     Certificates for the Shares shall be in definitive form and registered in such names and in such denominations as you shall request in writing not later than one full business day prior to the Closing Date. The certificates evidencing the Shares shall be delivered to you on the Closing Date for the account of the Underwriter, with any transfer taxes payable in connection with the transfer of the Shares to the Underwriter duly paid, against payment of the Purchase Price therefor.

     6.   Conditions to the Underwriter’s Obligations.   The obligations of the Selling Shareholders to sell the Shares to the Underwriter and the obligation of the Underwriter to purchase and pay for the Shares on the Closing Date are subject to the condition that the Registration Statement shall have become effective not later than 4:00 p.m. (New York City time) on the date hereof.

     The obligations of the Underwriter are subject to the following further conditions:

     (a)   Subsequent to the execution and delivery of this Agreement and prior to the Closing Date:

     (i)   there shall not have occurred any downgrading, nor shall any notice have been given of any intended or potential downgrading or of any review for a possible change that does not indicate the direction of the possible change, in the rating accorded any of the Company’s or any subsidiary’s securities or in the Company’s or any subsidiary’s financial strength or claims paying ability rating by any “nationally recognized statistical rating organization,” as such term is defined for purposes of Rule 436(g)(2) under the Securities Act; and

     (ii)   there shall not have occurred any change, or any development involving a prospective change, in the condition, financial or otherwise, or in the earnings, business or results of operations of the Company and its combined subsidiaries, taken as a whole, from that set forth in the Prospectus (exclusive of any amendments or supplements thereto subsequent to the date of this Agreement) that, in your judgment, is material and adverse and that makes it, in your judgment, impracticable to market the Shares on the terms and in the manner contemplated in the Prospectus.

     (b)   The Underwriter shall have received on the Closing Date a certificate, dated the Closing Date and signed by an executive officer of the Company, to the effect set forth in Section 6(a)(i) above and to the effect that the representations and warranties of the Company contained in this Agreement are true and correct as of the Closing Date and that the Company has complied with all of the agreements and satisfied all of the conditions on its part to be performed or satisfied hereunder on or before the Closing Date.

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     The officer signing and delivering such certificate may rely upon his or her knowledge as to proceedings threatened.

     (c)   The Underwriter shall have received on the Closing Date an opinion from Davis Polk & Wardwell, outside counsel for the Company, dated the Closing Date, covering the matters referred to in Exhibit A.

     (d)   The Underwriter shall have received on the Closing Date an opinion of Conyers Dill & Pearman, special Bermuda counsel to the Company, dated the Closing Date, substantially in the form of Exhibit B.

     (e)   The Underwriter shall have received on the Closing Date an opinion of Cahill Gordon & Reindel, special tax counsel to the Company, to the effect that the statements in the Prospectus under the heading “Material Tax Considerations” and in the Company’s Annual Report on Form 10-K for the year ended December 31, 2004 under the heading “Risk Factors – Risks Related to Taxation” which relate to United States income tax laws, regulations and rulings fairly summarize in all material respects such laws, regulations and rulings.

     (f)   The Underwriter shall have received on the Closing Date an opinion of counsel for each of the Selling Shareholders, dated the Closing Date, substantially in the form of Exhibit C.

     (g)   The Underwriter shall have received on the Closing Date an opinion of LeBoeuf, Lamb, Greene & MacRae, L.L.P., counsel for the Underwriter, dated the Closing Date, covering the matters referred to in the last paragraph of Exhibit A.

     (h)   The opinions of Davis Polk & Wardwell, Conyers Dill & Pearman and Cahill Gordon & Reindel shall be rendered to the Underwriter and the Selling Shareholders at the request of the Company and shall so state therein. The opinion of counsel for each of the Selling Shareholders shall be rendered to the Underwriter at the request of the Selling Shareholders and shall so state therein.

     (i)   The Underwriter shall have received, on each of the date hereof and the Closing Date, a letter dated the date hereof or the Closing Date, as the case may be, and upon delivery to PricewaterhouseCoopers of a letter of representations from any Selling Shareholder satisfactory to PricewaterhouseCoopers, such Selling Shareholder shall have received on the Closing Date, a letter dated the Closing Date, in form and substance satisfactory to the Underwriter, from PricewaterhouseCoopers, independent public accountants, containing statements and information of the type ordinarily included in accountants’ “comfort letters” to underwriters with respect to the financial statements and certain financial information contained in the Registration Statement and the Prospectus; provided that the letters delivered on the Closing Date shall use a “cut-off date” not earlier than the date hereof.

     7.   Covenants of the Company.   In further consideration of the agreements of the Underwriter herein contained, the Company covenants with the Underwriter and, subject to paragraph (g) below, each Selling Shareholder as follows:

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     (a)   To furnish to you, without charge, 5 conformed copies of the Registration Statement (including exhibits thereto and documents incorporated by reference) and to furnish to you in New York City, without charge, prior to 10:00 a.m. New York City time on the business day next succeeding the date of this Agreement and during the period mentioned in Section 7(c) below, as many copies of the Prospectus, any documents incorporated therein by reference and any supplements and amendments thereto or to the Registration Statement as you may reasonably request.

     (b)   Before amending or supplementing the Registration Statement or the Prospectus, to furnish to you a copy of each such proposed amendment or supplement and not to file any such proposed amendment or supplement to which you reasonably object, and to file with the Commission within the applicable period specified in Rule 424(b) under the Securities Act any prospectus required to be filed pursuant to such Rule.

     (c)   If, during such period after the first date of the public offering of the Shares as in the opinion of counsel for the Underwriter the Prospectus is required by law to be delivered in connection with sales by the Underwriter or dealer, any event shall occur or condition exist as a result of which it is necessary to amend or supplement the Prospectus in order to make the statements therein, in the light of the circumstances when the Prospectus is delivered to a purchaser, not misleading, or if, in the opinion of counsel for the Underwriter, it is necessary to amend or supplement the Prospectus to comply with applicable law, forthwith to prepare, file with the Commission and furnish, at its own expense, to the Underwriter and to the dealers (whose names and addresses you will furnish to the Company) to which Shares may have been sold by the Underwriter and to any other dealers upon request, either amendments or supplements to the Prospectus so that the statements in the Prospectus as so amended or supplemented will not, in the light of the circumstances when the Prospectus is delivered to a purchaser, be misleading or so that the Prospectus, as amended or supplemented, will comply with law.

     (d)   To endeavor to qualify the Shares for offer and sale under the securities or Blue Sky laws of such jurisdictions as you shall reasonably request, provided, that in no event shall the Company be obligated to qualify to do business in any jurisdiction where it is not now so qualified or to take any action that would subject it to material taxation or service of process in suits, other than those arising out of the offering or sale of the Shares, in any jurisdiction where it is not now so subject.

     (e)   To make generally available to the Company’s security holders and to you as soon as practicable an earnings statement covering the twelve-month period ending December 31, 2005 that satisfies the provisions of Section 11(a) of the Securities Act and the rules and regulations of the Commission thereunder.

     (f)   Whether or not the transactions contemplated in this Agreement are consummated or this Agreement is terminated, to pay or cause to be paid all expenses incident to the performance of its obligations under this Agreement, including: (i) the fees, disbursements and expenses of the Company’s counsel, the Company’s accountants in connection with the registration and delivery of the Shares under the Securities Act and all other fees or expenses in connection with the preparation and filing of the Registration

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Statement, any preliminary prospectus, the Prospectus and amendments and supplements to any of the foregoing, including all printing costs associated therewith, and the mailing and delivering of copies thereof to the Underwriter and dealers, in the quantities hereinabove specified, (ii) all costs and expenses related to the transfer and delivery of the Shares to the Underwriter, including any transfer or other taxes payable thereon, (iii) the cost of printing or producing any Blue Sky or Legal Investment memorandum in connection with the offer and sale of the Shares under state securities laws and all expenses in connection with the qualification of the Shares for offer and sale under state securities laws as provided in Section 7(d) hereof, including filing fees and the reasonable fees and disbursements of counsel for the Underwriter in connection with such qualification and in connection with the Blue Sky or Legal Investment memorandum, (iv) all filing fees and the reasonable fees and disbursements of counsel to the Underwriter incurred in connection with the review and qualification of the offering of the Shares by the National Association of Securities Dealers, Inc., (v) the cost of printing certificates representing the Shares, (vi) the costs and charges of any transfer agent, registrar or depositary, (vii) the costs and expenses of the Company relating to investor presentations on any “road show” undertaken in connection with the marketing of the offering of the Shares, including, without limitation, expenses associated with the production of road show slides and graphics, fees and expenses of any consultants engaged in connection with the road show presentations with the prior approval of the Company, travel and lodging expenses of the representatives and officers of the Company and any such consultants, and half of the cost of any aircraft chartered in connection with the road show (the remainder to be for the account of the Underwriter) and (viii) all other costs and expenses incident to the performance of the obligations of the Company hereunder for which provision is not otherwise made in this Section. It is understood, however, that except as provided in this Section, Section 8 entitled “Indemnity and Contribution”, and the last paragraph of Section 10 below, the Underwriter will pay all of its costs and expenses, including fees and disbursements of its counsel, stock transfer taxes payable on resale of any of the Shares by it and any advertising expenses connected with any offers it may make.

     (g)   The provisions of this Section shall not supersede or otherwise affect any agreement that the Company and the Selling Shareholders may otherwise have for the allocation of such expenses among themselves.

     8.   Indemnity and Contribution.

     (a)   The Company agrees to indemnify and hold harmless the Underwriter and each person, if any, who controls the Underwriter within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act, and each affiliate of any Underwriter within the meaning of Rule 405 under the Securities Act (collectively, the “indemnified Underwriter parties”), and each Selling Shareholder from and against any and all losses, claims, damages and liabilities (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim) caused by any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement or any amendment thereof, any preliminary prospectus or the Prospectus (as amended or supplemented if the Company

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shall have furnished any amendments or supplements thereto), or caused by any omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, except insofar as such losses, claims, damages or liabilities are caused by any such untrue statement or omission or alleged untrue statement or omission based upon information relating to the Underwriter furnished to the Company in writing by the Underwriter expressly for use therein; provided, however, that the foregoing indemnity agreement with respect to any preliminary prospectus shall not inure to the benefit of the Underwriter from whom the person asserting any such losses, claims, damages or liabilities purchased Shares, or any person controlling the Underwriter, if a copy of the Prospectus (as then amended or supplemented if the Company shall have furnished any amendments or supplements thereto) was not sent or given by or on behalf of the Underwriter to such person, if required by law so to have been delivered, at or prior to the written confirmation of the sale of the Shares to such person, and if the Prospectus (as so amended or supplemented) would have cured the defect giving rise to such losses, claims, damages or liabilities, unless the failure to send or give such Prospectus is the result of noncompliance by the Company with Section 7(a) hereof.

     (b)   Each Selling Shareholder agrees, severally and not jointly, to indemnify and hold harmless the Company, its directors, its officers who sign the Registration Statement and each person, if any, who controls the Company within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act, and each indemnified Underwriter party from and against any and all losses, claims, damages and liabilities (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim) caused by any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement or any amendment thereof, any preliminary prospectus or the Prospectus (as amended or supplemented if the Company shall have furnished any amendments or supplements thereto), or caused by any omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, but in each case only with reference to information relating to such Selling Shareholder furnished in writing by or on behalf of such Selling Shareholder expressly for use in the Registration Statement, any preliminary prospectus, the Prospectus or any amendments or supplements thereto, it being understood and agreed that the only such information furnished by any such Selling Shareholder consists of the information about such Selling Shareholder under the caption “Selling Shareholders” in the Prospectus; provided, however, that the foregoing indemnity agreement with respect to any preliminary prospectus shall not inure to the benefit of the Underwriter from whom the person asserting any such losses, claims, damages or liabilities purchased Shares, or any person controlling the Underwriter, if a copy of the Prospectus (as then amended or supplemented if the Company shall have furnished any amendments or supplements thereto) was not sent or given by or on behalf of the Underwriter to such person, if required by law so to have been delivered, at or prior to the written confirmation of the sale of the Shares to such person, and if the Prospectus (as so amended or supplemented) would have cured the defect giving rise to such losses, claims, damages or liabilities, unless the failure to send or give such Prospectus is the result of noncompliance by the Company with Section 7(a) hereof. Notwithstanding the

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provisions of this Section 8(b), no Selling Shareholder shall be required to pay an amount in excess of the net proceeds received by such Selling Shareholder from the Shares sold by it hereunder.

     (c)   The Underwriter agrees to indemnify and hold harmless the Company, the directors of the Company, the officers of the Company who sign the Registration Statement and each person, if any, who controls the Company within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act and each Selling Shareholder to the same extent as the foregoing indemnity from the Company to the Underwriter, but only with reference to information relating to the Underwriter furnished to the Company in writing by the Underwriter expressly for use in the Registration Statement, any preliminary prospectus, the Prospectus or any amendments or supplements thereto.

     (d)   In case any proceeding (including any governmental investigation) shall be instituted involving any person in respect of which indemnity may be sought pursuant to Section 8(a), 8(b) or 8(c), such person (the “indemnified party”) shall promptly notify the person against whom such indemnity may be sought (the “indemnifying party”) in writing and the indemnifying party, upon request of the indemnified party, shall retain counsel reasonably satisfactory to the indemnified party to represent the indemnified party and any others the indemnifying party may designate in such proceeding and shall pay the fees and disbursements of such counsel related to such proceeding. In any such proceeding, any indemnified party shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such indemnified party unless 1) the indemnifying party and the indemnified party shall have mutually agreed to the retention of such counsel or 2) the named parties to any such proceeding (including any impleaded parties) include both the indemnifying party and the indemnified party and representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them. It is understood that the indemnifying party shall not, in respect of the legal expenses of any indemnified party in connection with any proceeding or related proceedings in the same jurisdiction, be liable for (i) the fees and expenses of more than one separate firm (in addition to any local counsel) for the Underwriter and all persons, if any, who control the Underwriter within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act or who are affiliates of the Underwriter within the meaning of Rule 405 under the Securities Act, (ii) the fees and expenses of more than one separate firm (in addition to any local counsel) for the Company, its directors, its officers who sign the Registration Statement and each person, if any, who controls the Company within the meaning of either such Section and (iii) the fees and expenses of more than one separate firm (in addition to any local counsel) for all Selling Shareholders and all persons, if any, who control any Selling Shareholder within the meaning of either such Section, and that all such fees and expenses shall be reimbursed as they are incurred. In the case of any such separate firm for the Underwriter and such control persons and affiliates of the Underwriter, such firm shall be designated in writing by the Underwriter. In the case of any such separate firm for the Company, and such directors, officers and control persons of the Company, such firm shall be designated in writing by the Company. In the case of any such separate firm for the Selling Shareholders and such control persons of any Selling Shareholders, such

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firm shall be designated in writing by the Selling Shareholders. The indemnifying party shall not be liable for any settlement of any proceeding effected without its written consent, but if settled with such consent or if there be a final judgment for the plaintiff, the indemnifying party agrees to indemnify the indemnified party from and against any loss or liability by reason of such settlement or judgment. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement of any pending or threatened proceeding in respect of which any indemnified party is or could have been a party and indemnity could have been sought hereunder by such indemnified party, unless such settlement includes an unconditional release of such indemnified party from all liability on claims that are the subject matter of such proceeding and does not include a statement as to or an admission of fault, culpability or a failure to act, by or on behalf of any indemnified party.

     (e)   To the extent the indemnification provided for in Section 8(a), 8(b) or 8(c) is unavailable to an indemnified party or insufficient in respect of any losses, claims, damages or liabilities referred to therein, then each indemnifying party under such paragraph, in lieu of indemnifying such indemnified party thereunder, shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities (i) in such proportion as is appropriate to reflect the relative benefits received by the indemnifying party or parties on the one hand and the indemnified party or parties on the other hand from the offering of the Shares or (ii) if the allocation provided by clause 8(e)(i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause 8(e)(i) above but also the relative fault of the indemnifying party or parties on the one hand and of the indemnified party or parties on the other hand in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities, as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Shareholders on the one hand and the Underwriter on the other hand in connection with the offering of the Shares shall be deemed to be in the same respective proportions as the net proceeds from the offering of the Shares (before deducting expenses) received by the Company and each Selling Shareholder and the total underwriting discounts and commissions received by the Underwriter bear to the aggregate public offering price of the Shares. (For the purposes of this Section 8(e), the benefit to the Company shall be deemed to be equal to the total net proceeds from the offering of the Shares (before deducting expenses)). The relative fault of the Company or the Selling Shareholders on the one hand and the Underwriter on the other hand shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company or Selling Shareholders or by the Underwriter and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. Notwithstanding the provisions of this Section 8(e), no Selling Shareholder shall be required to pay an amount in excess of the net proceeds received by such Selling Shareholder from the Shares sold by it hereunder.

     (f)   The Company, the Selling Shareholders and the Underwriter agree that it would not be just or equitable if contribution pursuant to this Section 8 were determined

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by pro rata allocation or by any other method of allocation that does not take account of the equitable considerations referred to in Section 8(e). The amount paid or payable by an indemnified party as a result of the losses, claims, damages and liabilities referred to in the immediately preceding paragraph shall be deemed to include, subject to the limitations set forth above, any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 8, the Underwriter shall not be required to contribute any amount in excess of the amount by which the total price at which the Shares underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages that the Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The remedies provided for in this Section 8 are not exclusive and shall not limit any rights or remedies which may otherwise be available to any indemnified party at law or in equity.

     (g)   The indemnity and contribution provisions contained in this Section 8 and the representations, warranties and other statements of the Company and the Selling Shareholders contained in this Agreement shall remain operative and in full force and effect regardless of (i) any termination of this Agreement, (ii) any investigation made by or on behalf of the Underwriter or any person controlling the Underwriter or any affiliate of the Underwriter, any Selling Shareholder or any person controlling any Selling Shareholder or by or on behalf of the Company, the officers or directors of the Company or any person controlling the Company and (iii) acceptance of and payment for any of the Shares.

     (h)   The provisions of this Section shall not supersede or otherwise affect any agreement that the Company and the Selling Shareholders may otherwise have for the allocation of such indemnity and contribution matters among themselves.

     9.   Termination.   The Underwriter may terminate this Agreement by notice to the Company, if after the execution and delivery of this Agreement and prior to the Closing Date (i) trading generally shall have been suspended or materially limited on, or by, as the case may be, any of the New York Stock Exchange, the American Stock Exchange or the Nasdaq National Market, (ii) trading of any securities of the Company shall have been suspended on any exchange or in any over-the-counter market, (iii) a material disruption in the securities settlement, payment or clearance services in the United States shall have occurred, (iv) any moratorium on commercial banking activities shall have been declared by Federal or New York State or Bermuda authorities or (v) there shall have occurred any outbreak or escalation of hostilities, or any change in financial markets or any calamity or crisis that, in the Underwriter’s judgment, is material and adverse and which, singly or together with any other event specified in this clause (v), makes it, in the Underwriter’s judgment, impracticable or inadvisable to proceed with the offer, sale or delivery of the Shares on the terms and in the manner contemplated in the Prospectus.

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     10.   Effectiveness.   This Agreement shall become effective upon the execution and delivery hereof by the parties hereto.

     If this Agreement shall be terminated by the Underwriter, because of any failure or refusal on the part of the Company or any Selling Shareholder to comply with the terms or to fulfill any of the conditions of this Agreement, or if for any reason the Company or any Selling Shareholder shall be unable to perform its obligations under this Agreement, the Company and the Selling Shareholders will reimburse the Underwriter for all out-of-pocket expenses (including the fees and disbursements of their counsel) reasonably incurred by the Underwriter in connection with this Agreement or the offering contemplated hereunder.

     11.   Successors and Assigns.   This Agreement shall be binding upon and inure solely to the benefit of the parties hereto and their respective successors and assigns, and no other person shall acquire or have any right under or by virtue of this Agreement. No purchaser of any of the Shares from the Underwriter shall be deemed a successor or assign solely by reason of such purchase.

     12.   Counterparts.   This Agreement may be signed in two or more counterparts, each of which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument.

     13.   Applicable Law; Submission to Jurisdiction; Appointment of Agent for Service.

     (a)   This Agreement shall be governed by and construed in accordance with the internal laws of the State of New York.

     (b)   The Company irrevocably submits to the non-exclusive jurisdiction of any New York State or United States Federal court sitting in The City of New York over any suit, action or proceeding arising out of or relating to this Agreement, the Prospectus, the Registration Statement or the offering of the Shares. The Company irrevocably waives, to the fullest extent permitted by law, any objection which it may now or hereafter have to the laying of venue of any such suit, action or proceeding brought in such a court and any claim that any such suit, action or proceeding brought in such a court has been brought in an inconvenient forum. To the extent that the Company has or hereafter may acquire any immunity from the jurisdiction of any court or from any legal process with respect to itself or its property, it irrevocably waives, to the fullest extent permitted by law, such immunity in respect of any such suit, action or proceeding.

     (c)   The Company hereby irrevocably appoints CT Corporation System, with offices at 111 Eighth Avenue, New York, NY 10011, as its agent for service of process in any suit, action or proceeding described in the preceding paragraph. The Company agrees that service of process in any such suit, action or proceeding may be made upon it at the office of its agent. The Company waives, to the fullest extent permitted by law, any other requirements of or objections to personal jurisdiction with respect thereto. The Company represents and warrants that its agent has agreed to act as agent for service of process, and each agrees to take any and all action, including the filing of any and all

16

documents and instruments, that may be necessary to continue such appointment in full force and effect.

     14.   Headings.   The headings of the sections of this Agreement have been inserted for convenience of reference only and shall not be deemed a part of this Agreement.

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SCHEDULE I

I-1

Accepted as of the date hereof
Goldman, Sachs & Co.

EXHIBIT A

FORM OF OPINION OF DPW
TO BE DELIVERED PURSUANT
TO SECTION 6(C)

     1.   Neither the execution, delivery or performance of the Underwriting Agreement by the Company, nor compliance by the Company with the provisions thereof, nor or the consummation by the Company of the transactions contemplated therein (A) to our knowledge, requires any consent, approval, authorization or any other order of, or registration or filing with, any United States Federal or New York State court, regulatory body or administrative agency (a “U.S. Regulatory Authority”), except for such consents, approvals, authorizations and orders (i) as have been obtained and (ii) as may be required under state securities or Blue Sky laws of any jurisdiction in connection with the purchase and distribution of the Shares by the Underwriter (as to which we express no opinion), (B) conflicts with or constitutes a breach of, or a default under, any bond, debenture, note or other evidence of indebtedness or any agreement, indenture, lease or other instrument set forth on Schedule I hereto, to the extent such documents are governed by New York law, or (C) to our knowledge, violates any existing United States Federal or New York State law or regulation or any ruling, judgment, injunction, order or decree of any U. S. Regulatory Authority (other than state securities or Blue Sky laws of any jurisdiction in connection with the purchase and distribution of the Shares by the Underwriter, as to which we express no opinion) that is applicable to the Company or the Designated Subsidiaries.

     2.   To our knowledge, (A) there are no United States Federal or New York State legal or governmental proceedings pending or threatened against the Company or any of the Designated Subsidiaries, or to which the Company or any of the Designated Subsidiaries or any of their respective properties is subject, that are required to be described in the Registration Statement or Prospectus and are not so described and (B) there are no agreements, contracts, indentures, leases or other instruments of a character that are required to be described in the Registration Statement or the Prospectus or to be filed as an exhibit to the Registration Statement that are not described or filed as required, as the case may be.

     3.   The statements relating to United States Federal or New York State legal matters, proceedings or documents under the caption “Description of Share Capital” in the Prospectus and the caption “Item 5 — Market for Registrant’s Common Equity and Related Stockholder Matters and Issuer Purchases of Equity Securities — Shareholders Agreement” in the Form 10-K for the year ended December 31, 2004, together with the statements in the Prospectus amending and supplementing such legal matters, proceedings or documents, fairly summarize in all material respects such matters, proceedings or documents.

     4.   To the extent that the laws of the State of New York are applicable, the Company (A) has validly submitted to the non-exclusive jurisdiction of any New York State or Federal court sitting in The City of New York over any suit, action or proceeding arising out of or relating to the Underwriting Agreement, the Prospectus, the Registration Statement or the offering of the Shares, (B) has validly waived any objection to the venue of a proceeding in any such New York court (although any such New York Court may on its own accord find that venue

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in a particular case is inappropriate), and (C) has duly appointed CT Corporation System as its authorized agent for the purposes described in the Underwriting Agreement, assuming (i) the validity of such actions under Bermuda law and (ii) the due authorization, execution and delivery of the Underwriting Agreement by or on behalf of the Underwriter.

     5.   The Company is not required to register as an “investment company” as such term is defined in the Investment Company Act of 1940, as amended.

     We have not ourselves checked the accuracy, completeness or fairness of, or otherwise verified, the information furnished with respect to other matters in the Registration Statement or the Prospectus, including the Incorporated Documents. We have generally reviewed and discussed with your representatives, and with certain officers and employees of, and counsel and independent public accountants for, the Company the information furnished, whether or not subject to our check and verification. On the basis of such consideration, review and discussion, but without independent check or verification except as stated above, (i) in our opinion, the Registration Statement and the Prospectus, including the Incorporated Documents (except for the financial statements and financial schedules and other financial and statistical data included therein, as to which we express no opinion), appear on their face to be appropriately responsive in all material respects to the requirements of the Securities Act and the applicable rules and regulations of the Commission thereunder and (ii) nothing has come to our attention that causes us to believe that (a) the Registration Statement or the Prospectus included therein, including the Incorporated Documents (except for the financial statements and financial schedules and other financial and statistical data included therein, as to which we express no belief ), as of the date of the Prospectus Supplement contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading or (b) the Prospectus, including the Incorporated Documents (except as stated), as of the date of the Prospectus Supplement or as of the date hereof contained or contains any untrue statement of a material fact or omitted or omits to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading.

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SCHEDULE I TO DPW OPINION

     1.   Underwriting Agreement.

     2.   Share Purchase Warrant, dated as of January 3, 2002, between Montpelier Re Holdings Ltd. (the “Company”) and Banc of America Securities LLC, as amended by Amendment, dated as of February 11, 2002, as further amended by Amendment, dated as of July 1, 2002, as further amended by Amendment 3, dated as of March 31, 2003.

     3.   Share Purchase Warrant, dated January 3, 2002, between the Company and Benfield Group plc, as amended by Amendment, dated as of February 11, 2002, as further amended by Amendment, dated as of July 1, 2002, as further amended by Amendment 3, dated as of March 31, 2003.

     4.   Share Purchase Warrant, dated January 3, 2002, between the Company and White Mountains Insurance Group, Ltd., as amended by Amendment, dated as of February 11, 2002, as further amended by Amendment, dated as of July 1, 2002, as further amended by Amendment 3, dated as of March 31, 2003.

     5.   Shareholders Agreement, dated as of December 12, 2001, among the Company and each of the persons listed on Schedule 1 thereto, as amended by Amendment No. 1, dated December 24, 2001.

     6.   Service Agreement, dated as of December 12, 2001, between Anthony Taylor, the Company and Montpelier Reinsurance Ltd, as further amended by Amendment, dated as of August 27, 2004.

     7.   Service Agreement, dated as of January 24, 2002, between Anthony Taylor and Montpelier Marketing Services (UK) Limited.

     8.   Service Agreement, dated as of January 1, 2002, between C. Russell Fletcher, III and Montpelier Reinsurance Ltd.

     9.   Service Agreement, dated as of January 1, 2002, between Thomas George Story Busher and Montpelier Reinsurance Ltd.

     10.   Service Agreement, dated as of January 24, 2002, between Thomas George Story Busher and Montpelier Marketing Services (UK) Limited.

     11.   Service Agreement, dated as of January 24, 2002, between Nicholas Newman-Young and Montpelier Marketing Services (UK) Limited.

     12.   Share Option Plan, as amended August 27, 2004.

     13.   Performance Unit Plan, as amended August 27, 2004.

A-3

     14.   Amended Letter of Credit Reimbursement and Pledge Agreement, dated as of May 27, 2004, among Montpelier Reinsurance Ltd., Montpelier Re Holdings Ltd., the Lenders party thereto and Bank of America, N.A.

     15.   Service Agreement, dated as of August 27, 2004, between Montpelier Re Holdings Ltd. and Anthony Taylor.

     16.   Service Agreement, dated as of August 27, 2004, between Montpelier Marketing Services (UK) Limited and Anthony Taylor.

     17.   Severance Plan, dated as of August 27, 2004.

     18.   Long-Term Incentive Plan, dated as amended August 27, 2004.

     19.   Service Agreement, dated as of September 8, 2004, between Montpelier Reinsurance Ltd. and Kernan V. Oberting.

     20.   Letter of Credit Reimbursement and Pledge Agreement, among Montpelier Reinsurance Ltd. and HSBC Bank USA, National Association, dated December 23, 2004.

     21.   Montpelier Re Holdings Ltd. 2005 Annual Bonus Plan.

     22.   Montpelier Re Holdings Ltd. Directors Share Plan.

     23.   Net Share Settlement Agreement between Montpelier Re Holdings Ltd. and Anthony Taylor.

     24.   Net Share Settlement Agreement between Montpelier Re Holdings Ltd. and Thomas George Story Busher.

     25.   Net Share Settlement Agreement between Montpelier Re Holdings Ltd. and C. Russell Fletcher III.

     26.   Net Share Settlement Agreement between Montpelier Re Holdings Ltd. and Nicholas Newman-Young.

     27.   Montpelier Reinsurance Ltd. Amended and Restated Deferred Compensation Plan.

A-4

EXHIBIT B

FORM OF OPINION OF CD&P TO BE DELIVERED PURSUANT TO SECTION 6(D)

B-1

B-2

B-3

SCHEDULE I

In the Company’s Annual Report on Form 10-K for the Fiscal Year Ended December 31, 2004

In the Company’s Prospectus, dated 23 February 2004

B-4

EXHIBIT C

FORM OF OPINION OF COUNSEL TO EACH OF THE SELLING SHAREHOLDERS
TO BE DELIVERED PURSUANT TO SECTION 6(F)

     1.   The Underwriting Agreement has been duly authorized, executed and delivered by or on behalf of each of the Selling Shareholders;

     2.   The execution and delivery by each Selling Shareholder of, and the performance by such Selling Shareholder of its obligations under, the Underwriting Agreement will not contravene any provision of applicable law, or the certificate of incorporation or bylaws of such Selling Shareholder (if such Selling Shareholder is a corporation), or, to the best of such counsel’s knowledge, any agreement or other instrument binding upon such Selling Shareholder [Note: Such agreements to consist of all fund organizational documents, the Shareholders Agreement and the Amended and Restated Letter of Acknowledgement Regarding Form S-3 Shelf.], or, to the best of such counsel’s knowledge, any judgment, order or decree of any governmental body, agency or court having jurisdiction over such Selling Shareholder, and no consent, approval, authorization or order of, or qualification with, any governmental body or agency is required for the performance by such Selling Shareholder of its obligations under the Underwriting Agreement, except such as may be required by the securities or Blue Sky laws of the various states in connection with offer and sale of the Shares;

     3.   Each of the Selling Shareholders has the legal right and power, and all authorization and approval required by law, to enter into this Underwriting Agreement and to sell, transfer and deliver the Shares to be sold by such Selling Shareholder or a security entitlement in respect of such Shares;

     4.   Upon payment for the Shares to be sold by the Selling Shareholders pursuant to the Underwriting Agreement, delivery of such Shares, as directed by the Underwriter, to Cede or such other nominee as may be designated by DTC, registration of such Shares in the name of Cede or such other nominee and the crediting of such Shares on the books of DTC to the securities account of the Underwriter (assuming that neither DTC nor any the Underwriter has notice of any adverse claim within the meaning of Section 8-105 of the UCC to such Shares), (A) DTC shall be a “protected purchaser” of such Shares within the meaning of Section 8-303 of the UCC, (B) under Section 8-501 of the UCC, the Underwriter will acquire a valid security entitlement in respect of such Shares and (C) no action based on any “adverse claim” (within the meaning of Section 8-102 of the UCC) to such Shares may be asserted against the Underwriter with respect to such security entitlement; in giving this opinion, counsel for the Selling Shareholders may assume that when such payment, delivery and crediting occur, (x) such Shares will have been registered in the name of Cede or another nominee designated by DTC, in each case on the Company’s share registry in accordance with its certificate of incorporation, bylaws and applicable law, (y) DTC will be

C-1

registered as a “clearing corporation” within the meaning of Section 8-102 of the UCC and (z) appropriate entries to the accounts of the Underwriter on the records of DTC will have been made pursuant to the UCC

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