Might be worth trying to beg/borrow/steal a copy:
Air-Britain's RAF Serials index records WP811's history as:
24 RFS
10 RFS
202 AFS
7 FTS
83 Gp CF
Wildenrath
Southampton UAS
Birmingham UAS
Edinburgh UAS
Manchester UAS
1 SoTT
South Cerney
Halton
Benson
1 SoTT