Scanned from a picture in a WW2 era scrapbook of aircraft pictures.
Vickers Wellington Mk 1C KX-M of No 311 (Czechoslovak) Squadron RAF, photo taken in 1941
Sadly the aircraft was lost with all crew on 26 June 1942 while flying with 12 OTU on a raid on Bremen. It still retained the 331 Sqn markings.