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Exhibit 4.37



|C L I F F O
R D |  | LIMITED
LIABILITY PARTNERSHIP
|--------------- |  | -----------------------------
|C H A N C E     |  |                              
|                |  |                              
|                |  |                              
|                |  |                              

CGU INTERNATIONAL INSURANCE PLC

AND

ROYAL & SUN ALLIANCE INSURANCE PLC

AND

CONVERIUM AG

AND

MÜNCHENER RÜCKVERSICHERUNGS-GESELLSCHAFT AKTIENGESELLSCHAFT IN MÜNCHEN

AND

NORTHERN STATES AGENCY, INC.





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SUPPLEMENTAL AGREEMENT TO THE AGREEMENT FOR THE SALE AND
PURCHASE OF CGU INTERNATIONAL INSURANCE PLCS AND PART
OF ROYAL & SUN ALLIANCE INSURANCE PLCS SHAREHOLDING IN
GLOBAL AEROSPACE UNDERWRITING MANAGERS LIMITED


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CONTENTS

|       |  |                |  |  |   |      |  | 
|------ |  | -------------- |  |  | - | ---- |  | 
|Clause |  |                |  |  |   | Page
|       |  |                |  |  |   |     
|1      |  | Interpretation |  |  | 1 |     
|2      |  | Agreement      |  |  | 2 |     
|3      |  | Reliance       |  |  | 2 |     





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THIS SUPPLEMENTAL AGREEMENTis made on

BETWEEN:



|(1) |  | CGU INTERNATIONAL INSURANCE PLC, a company incorporated in England and
Wales (registered no. 21487), whose registered office is at St Helens, 1
Undershaft, London EC3P 3DQ, England;          
|--- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   
|(2) |  | ROYAL & SUN ALLIANCE INSURANCE PLC, a company incorporated in England and
Wales (registered no. 93792), whose registered office is at St Marks
Court, Chart Way, Horsham, West Sussex RH12 1XL;
|   
|(3) |  | CONVERIUM AG, a company incorporated in Switzerland whose registered
office is at General Guisan-Quai 26, 8022 Zürich, Switzerland;                                                             
|   
|(4) |  | MÜNCHENER RÜCKVERSICHERUNGS-GESELLSCHAFT AKTIENGESELLSCHAFT IN MÜNCHEN,
whose registered office is at Königinstraße, 107, 80802 München, Germany;                                               
|   
|(5) |  | NORTHERN STATES AGENCY, INC., a company incorporated in Minnesota, USA,
whose registered office is at 2145 Ford Parkway, Suite 202, St Paul,
Minnesota, United States of America 55116-1862.    

WHEREAS:



|(A) |  | Clause 8.1 of the Agreement for the Sale and Purchase of CGU
International Insurance plcs and part of Royal & Sun Alliance Insurance
plcs shareholding in Global Aerospace Underwriting Managers Limited dated
27 November 2002 (the Agreement) provides that Completion is conditional
upon the Conditions set out in clauses 8.1.1, 8.1.2 and 8.1.3 of the
Agreement being satisfied on or before 30 June 2003. Clause 8.1.2 of the
Agreement sets out a Condition which applies in the event that a filing or
filings are required in Canada.
|--- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   
|(B) |  | Clause 24.1 of the Agreement provides that the Sellers and the Buyers
shall have certain rights and obligations in the event that a merger
control filing or filings are required in Argentina, Brazil and/or Taiwan.                                                                                                                                                                                                                                                                                                                               
|   
|(C) |  | The parties to the Agreement wish to record in this Supplemental
Agreement their agreement of certain matters pertaining to clauses 8.1 and
24.1 of the Agreement.                                                                                                                                                                                                                                                                                                                                                                                  

THE PARTIES AGREEas follows:



|1.  |  | INTERPRETATION                                                                                                                                                                                                                                                            
|--- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   
|1.1 |  | In this Supplemental Agreement, the Agreement means the Agreement for
the Sale and Purchase of CGU International Insurance plcs and part of
Royal & Sun Alliance Insurance plcs shareholding in Global Aerospace
Underwriting Managers Limited dated 27 November 2002.
|   
|1.2 |  | Terms defined in the Agreement shall have the same meaning in this
Supplemental Agreement.                                                                                                                                                                                





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##### 





|1.3 |  | The provisions of clauses 1.2, 1.3 (Interpretation), 16 (Assignment), 27
(Third Party Rights), 28 (General), 29 (Notices) and 30 (Governing Law and
Jurisdiction) of the Agreement shall apply to this Supplemental Agreement
as if incorporated herein.
|--- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   
|2.  |  | AGREEMENT                                                                                                                                                                                                                                               
|   
|2.1 |  | In consideration for the granting of the mutual promises and waivers
contained herein the parties to this Supplemental Agreement agree that:                                                                                                            



| | 2.1.1 |  | no filing is required in Canada, and therefore the Condition
in clause 8.1.2 of the Agreement is satisfied; and                 
| | ----- |  | --------------------------------------------------------------------------------------------------------------------------------
|
| | 2.1.2 |  | no merger control filing or filings are required in Argentina
or Taiwan, and therefore in relation to Argentina and Taiwan only:
|



| | (a) |  | clause 24.1.1 of the Agreement shall not impose
any obligations on the Sellers;                                                                                                                                                                                                                                                                                                                                                                                
| | --- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
| | (b) |  | clause 24.1.2 of the Agreement shall not impose
any obligations on the Buyers; and                                                                                                                                                                                                                                                                                                                                                                             
|
| | (c) |  | each party to the Agreement waives any right
conferred on it by clause 24.1.3 of the Agreement that, in
the event that any party to the Agreement is prohibited by
the relevant competition authorities in Argentina or Taiwan
from carrying out any of their obligations under the
Agreement (including, without limitation, completing the
Agreement), such parties shall not be required to perform
such obligations until such prohibition has been lifted,
|

| | PROVIDED THATsub-paragraphs (a) to (c) above shall not apply in
the case of Argentina if the Argentinean Antitrust Commission
determines that a merger control filing is or filings are required
in Argentina.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|3. |  | RELIANCE                                                                                                                                                                                                                                    
|-- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|  
|   |  | Each party to this Agreement confirms that it has entered into this
Agreement based on its own assessment of the matters referred to herein
and has not relied on any statement or representation by or on behalf of
any other party hereto.





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EXECUTEDby the parties:



|                                   |  
|---------------------------------- | -
|Signed by ________________________ | )
|
|a duly authorised                  | )
|
|representative of                  | )
|
|CGU INTERNATIONAL        )         |  
|
|INSURANCE PLC                      | )
|
|                                  
|
|Signed by ________________________ | )
|
|a duly authorised                  | )
|
|representative of                  | )
|
|ROYAL & SUN ALLIANCE               | )
|
|INSURANCE PLC                      | )
|
|                                  
|Signed by ________________________ | )
|
|and _____________________________  | )
|
|for and on behalf of               | )
|
|CONVERIUM AG                       | )
|
|                                  
|Signed by ________________________ | )
|
|and _____________________________  | )
|
|duly authorised                    | )
|
|representatives of                 | )
|
|MÜNCHENER                          | )
|
|RÜCKVERSICHERUNGS-                 | )
|
|GESELLSCHAFT                       | )
|
|AKTIENGESELLSCHAFT                 | )
|
|IN MÜNCHEN                         | )
|
|                                  
|Signed by ________________________ | )
|
|and _____________________________  | )
|
|duly authorised                    | )
|
|representatives of                 | )
|
|NORTHERN STATES                    | )
|
|AGENCY, INC.                       | )
|