Hello L9172 again. Sorry to hear of your father and that Blenheim.
I can ask my friend about "6634", but his entry is quite clear in the log book, and he flew it on two separate days. I think it must be genuine.
I must dig out my very old Air Britain books on the L series, but it is so wet and cold until the snow melts here that I am leaving them in their "shed".
I would very much like to tie up the aircraft codes with the serials.
I don't want to clutter up the site with too many numbers, although some of us like them! So if needed we can continue by PM or email.
However, the codes I am looking for are 1,2,4,21,24,26,29,30,35,41,42,44,48,49,62,73.
Cheers, Laurence