Prime Minister Winston Churchill examines his own marksmanship with a Sten gun on a visit to Experimental Establishment, Shoeburyness, on 1 June 1941. 

Official photograph by Major W G Horton, War Office photographer, World War Two, Home Front (1939-1945), 13 June 1941.

Churchill was accompanied by the Secretary of State for Air, Sir Archibald Sinclair (far left), who served with Churchill on the Western Front.

From an album containing 58 photographs relating to the Auxiliary Territorial Service Experimental Gunnery Assistants and the Experimental Establishment, Shoeburyness, Essex, 1940-1941.