Hello Brian
A note indicated that the following Whitley and Blenheim accidents were possibly connected (firing / incident?):-
Whitley V, N1367 of 77 Squadron Operating from Driffield landed in a field at Fecamp 3rd January 1940 F/Lt B. S.Tomlin Captain and F/O T. H. Parrott Pilot with "E.F." "L17" being Engine failure on Accident Card. Other crew were R. S. or R. E. Charlton, H. Perry and R. H. Erickson.
An Air Ministry Acc Branch note found for Whitley N1367 accident was in the file of Blenheim L8399 of 604 Squadron Captain Sgt A. W. Woolley with Blenheim L8399 place of accident Thornwood Common, Epping on 3rd January 1940. Other crew were H. J. Crump and A Penn.
I don't have the AM1180 for the Blenheim yet, perhaps a check of both the Squadron and Station ORBs might reveal more?
A 1940 online reference of the Blenheim only states:-
"The New Year got off to a good start with Sergeant Arthur Woolley suffering engine failure and having to force-land Blenheim L8399 in the vicinity of Epping on 3rd January."
Mark