It was declared ready for operations with Vickers Wellington Mk I medium bombers on 24 April 1941.

On the night of 24–25 April 1941 two crews flew the squadron's first combat mission against fuel tanks in Rotterdam.

Due to large losses suffered in early 1942, including six crews lost in April, and difficulties in recruiting replacements, it was decided to transfer the squadron to RAF Coastal Command.

While in Bomber Command the squadron completed 488 missions in 2,481 hours, dropping some 800 tons of bombs, losing 102 airmen killed or missing in action, and 35 as prisoners of war.

[2] Several times Polish crews attacked U-boats and fought with German long-range aircraft.

[2] On 9 February 1943 one Wellington evaded attacks by four Ju 88 for nearly an hour until they ran out of ammunition, and escaped with two Polish crewmen injured; similar combat with four Ju 88 took place on 5 September 1943, without losses, in spite of 116 bullet holes found.

[7] After the end of the war in Europe, on 14 June 1945 the squadron was transferred to Transport Command, and operated scheduled services with Warwick C.3s to Greece and Italy.

[8] In May the squadron converted to Halifax Mk C.8 unarmed transports and was disbanded a few months later on 18 December 1946.