No 9 Squadron of Bomber Command converted from the Wellington to the Lancaster in August 1942. W4964 was the seventieth Lanc to arrive on squadron, in mid April 1943. She flew her first op on the 20th, by which time No 9 had lost forty one of their Lancs to enemy action and another five had been transferred to other squadrons and lost by them. A further thirteen of the seventy would soon be lost by No 9. All of the remaining eleven would be damaged,...