Thanks for the replies.

Yes the Flying Fortress in question is the one flown back to RAF Bassingbourne by Johnny Wynne after his crew baled out.

Unfortunately I don’t know what happened to my Grandfather’s log book, etc, and I have nothing (not even photos) from his time with 214 Squadron.

Equally unfortunate was that I never quizzed him in depth about his time in 214 Squadron, as I new it was an uncomfortable subject.