Incorrect. At yesterday's AGM it was confirmed that Board members on leaving their posts only get staff travel for as many years as they worked for BA. The only exception is for past CEOs who retain staff travel for life.
The big anomoly is the fact that other airlines retirees can, if their own airlines rules permit, retain the ability to use BA for life under the interline agreements as it would be impractical for BA to check their length of service and dates of retirement.