Hi, I stumbled into this forum while searching internet for info on PB512, and saw Creaking Door’s post below:
“Thanks for answering my request; I’m trying to find out whether Lancaster PB512 was used operationally before it was lost in a flying accident on 23rd September 1944. From its serial number it probably wouldn’t have been delivered before August 1944.”

I have the personal diaries and log book of R H Allen who was a Flight Engineer and Bomber with 582, and served between 1943 and 1945 including 56 operations. The Log book mentions date, aircraft, pilot, capacity he flew as, details of the operation, and hours by day / night. Here’s the strange part: he mentions that he flew in PB512 on 30.9.44 and even adds comment that he took controls for 10 minutes. Obviously, something wrong here. The info is written very neatly so I doubt it is me reading it wrongly, and the date given is between 2 others in sequence, so this is strange indeed.