James-- By the Royal Regiment do you mean The Royal Regiment of Artillery ???
I served in the regt. in the BAOR(British Army on the Rhine) West Germany 1952/54 and have contacts via The Royal Artillery Association and The Royal Horse Artillery Association --For your information-- Army Records Office
address is -The Army Records Office-Bourne Avenue--Hayes-Middlesex UB3 IRF--
When enquiring this info. will help.-- Full Name --Service Number--Date of birth
and most recent unit from which the individual was discharghed and rank on discharge. You will be sent a declaration of kinship which must be comepleted and returned There is a charge for this service.A reply may take up to 2 Months Regards John CAllow