I need to correct the information I gave above. I´ve been in contact with Iceland´s premier WW2 Air Historian, Mr. Ragnar Ragnarsson, as I had a feeling he might have some info. And he had! Mr. Ragnarsson had copies of the original IWM´s photographs. The photos are IWM ref. CS63 and CS64. Mr. Ragnarsson was able to read two serials for sure. “K” is Z4575 and “D” (or “O” depending how you read the rectangular sign on the nose) is Z4048. He was not able to get conclusive serials for the other aircraft in the photograph.

Regarding the colours for the aircraft, I can not comment.