Anthony Nelson Alfred Joseph Spencer.

With a surname and forenames like your friends father I would ask him to write to RAF Innsworth even without a service number and see what comes back.

Service records of Officers that served from 1922 onwards and Airmen that served from 1924 onwards are held at Personnel Management Agency (PMA).Please write to:

PMA IM 1B RAF
Room 5Building 248A
RAF Personnel Management Agency
RAF Innsworth
Gloucester
GL3 1EZ

Tel: 01452 712612 (ext: 7622)
You might just strike it lucky.

Good luck

Brian.