Description: U.K. life insurers writing participating business have, since the end of 2004, been required by their regulator, the Financial Services Authority FSA, to value their assets and liabilities on a market-consistent basis. The purpose of this paper is to explain the new valuation approach based on market-consistent values and its rationale set out the issues faced by life insurers in implementing the new regime and explain how these issues have been addressed by insurers.