No. 311 (Czech) Squadron

No. 311 Squadron RAF
Badge of № 311 Squadron RAF
Active	29 July 1940 – 15 February 1946
Country	United Kingdom
Allegiance	Czechoslovak National Liberation Committee
Branch	Royal Air Force
Role	Bomber, maritime patrol, transport
Motto(s)	(Czech): Na množství nehleďte ("Never regard their numbers", Hussite battle cry)
Insignia
Squadron badge	A thresher and a morning star in saltire, the halves fracted.
Squadron codes	KX (July 1940 – April 1942) PP (1945 – February 1946)
Aircraft flown
Bomber	Vickers Wellington Consolidated Liberator

No 311 (Czechoslovak) Squadron RAF was a Czechoslovak-manned bomber squadron of the Royal Air Force in the Second World War. It was the RAF's only Czechoslovak-manned heavy bomber squadron and it suffered the heaviest losses of any Czechoslovak formation in the RAF. In the Second World War 511 Czechoslovaks serving in Allied air forces were killed. Of these 273 (53%) died while serving with 311 Squadron.

After the end of the war, 311 Squadron disbanded as an RAF unit and became part of the reformed Czechoslovak Air Force.

It was first formed at RAF Honington on 29 July 1940, equipped with Wellington I bombers and crewed mostly by Czechoslovak aircrew who had escaped from Europe. It was transferred from Bomber Command to Coastal Command in April 1942 to carry out maritime patrol work. It re-equipped with Consolidated B-24 Liberator bombers in June 1943 and continued anti-submarine work but now over the Bay of Biscay. The squadron was responsible for the sinking of the German blockade runner Alsterufer on 28 December 1943 prior to the Battle of the Bay of Biscay.

After the End of World War II in Europe, in June 1945 the squadron was transferred to RAF Transport Command and began flights between the UK and Czechoslovakia. The squadron continued flying from UK bases until it was disbanded in the UK at RAF Milltown on 15 February 1946, but from 21 August 1945 it actually flew from Ruzyně Airport, Prague.

This squadron displayed the squadron code letters "KX" on its Wellingtons and later "PP" on its Liberators.