World War II bomber: Brother of navigator on conditions on board

A memorial to the crew of a Lancaster bomber is due to be unveiled in Holland, 67 years after the plane went missing during World War II.

Of the seven-man crew on board the bomber, only three bodies were ever found.

One of those on board was the great-uncle of BBC Radio 5Live reporter Bob Walker, who has been trying to find out what happened to his relative on what was a disastrous night for Bomber Command.

John Travers Clarke is the younger brother of the bomber's navigator, Evelyn Travers Clarke. He explains what conditions would have been like on that night in 1944.