Fred Colville was lost in Lancaster BIII ND390, and is buried in Durnbach War Cemetery (He was originally laid to rest at Ahorn, but as part of the CWGC policy of consolidation - ensuring that graves were properly cared for - he was reburied at Durnbach in 1947).
His pilot was Desmond Rowlands, who was featured
here a few weeks ago.
Two asides - one of his fellow air gunners in the crew was Richard Trevor-Roper, Guy Gibson's rear gunner on Op Chastise; and of the seven crew members, six were commissioned officers.
(And yes, I will pass this on in case it's of any help)