I see that Sgt. Pearce's number is 565936 which makes him an ex-brat so try:-
Royal Air Force Halton Apprentices Association
The Airfield
RAF Halton
Aylesbury
Bucks. HP22 5PG
01296 623535 ext 6300 with Answerphone
or direct line with fax on 01296 696896.
The office is manned Tuesdays, Wednesdays and Thursdays only, between 0900 and 1300 hrs.