This has been posted before but there has been some debate as to its
authenticity.
Its authenticity is now proved beyond doubt
http://www.roger.beckwith.btinternet...epwar/lanc.jpg
Reg Pidsley (left) with Wynford Vaughan Thomas in front of Lancaster F for
Freddie of 207 Squadron prior to flying on a Berlin raid, 3rd September
1943. Reg recorded the voices of the crew during the flight. He later
commented that when the bombs were released, "it was like going up in a
lift" and the cutting head dug into the disc.
Original, disputed clip from recording
http://www.stolly.org.uk/lanc.wav
Start of entire BBC recording
http://www.stolly.org.uk/1-001.mp3
Under attack
http://www.stolly.org.uk/2-001.mp3
Home safe
http://www.stolly.org.uk/3-001.mp3
I have the whole recording from the sound archive at the IWM.