EXPLANATORY NOTE: DEREGISTRATION OF SECURITIES

On December 18, 2002, AmerUs Group Co., an Iowa corporation (the "Company"), filed a registration statement on Form S-8 (No. 333-101961) (the "Registration Statement"), which registered $30,000,000 in deferred compensation obligations of the Company (the "Deferred Compensation Obligations") to be paid in common stock, no par value per share, of the Company (the "Common Stock"), pursuant to the All*AmerUs Supplemental Executive Retirement Plan (the "Plan").

On November 15, 2006 (the "Closing Date"), pursuant to an Agreement and Plan of Merger, dated as of July 12, 2006, among the Company, Aviva plc, a public limited company organized under the laws of England and Wales ("Aviva"), and Libra Acquisition Corporation, an Iowa corporation and a wholly owned subsidiary of Aviva ("Merger Sub"), Merger Sub merged with and into the Company (the "Merger"), with the Company surviving the Merger and continuing its existence as a wholly owned subsidiary of Aviva. On November 15, 2006, the Company filed a certification and notice of termination of registration on Form 15 with respect to the Common Stock.

As a result of the Merger, the Company has terminated all offerings of the Company's securities under the Registration Statement. Accordingly, pursuant to the undertaking contained in the Registration Statement to remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering, the Company is filing this Post-Effective Amendment No. 1 to the Registration Statement to deregister all its securities reserved for issuance under the Plan which remain unissued on the Closing Date.