Larry. I'm sure it was AH851 SP-F which was written-off in Oct. 1941 with 400 Sqn. RCAF from Odiham. AH781 was in an accident at Merston on Dec. 1 1941, evidently repaired.
Regards
Nick
AH781 pilot F/Sgt. Shephard's certificates from the CWGC; Urmston is Gt. Manchester.
https://www.cwgc.org/find-records/fi...bert-shephard/