I am trying to track down a pension for a relative. They worked in the motor industry. I know the pension was run by MAA Pensions Ltd based in Leighton Buzzard. They seem to have become Motor Industry Pensions Ltd based at the same address, but a letter was returned addressee unknown and the telephone number is never answered.   I can find Motor Industry Pensions Plan Trustees Ltd, but this seems to be a private limited company.   Any information gratefully received.