asked the Minister for the Civil Service what formula is currently employed to calculate a retired Service man's commuted pension entitlement, including the rate of interest currently applied in that computation; how often that rate of interest is changed; on what basis it is changed, and what is the life expectancy assumed; and whether any different life expectancy is assumed as between men and women.

As the information requested is rather lengthy, I will write to the hon. Member about it as soon as I can.