The Entertainments National Service Association (ENSA) was an organisation established in 1939 by Basil Dean and Leslie Henson to provide entertainment for British armed forces personnel during World War II. ENSA operated as part of the Navy, Army and Air Force Institutes. It was superseded by Combined Services Entertainment (CSE) which now operates as part of the Services Sound and Vision Corporation (SSVC).

Basil Herbert Dean CBE was an English actor, writer, producer and director in the theatre and in cinema. He founded the Liverpool Repertory Company in 1911 and in the First World War, after organising unofficial entertainments for his comrades in the army, he was appointed do so officially. After the war he produced and directed mostly in the West End. He staged premieres of plays by writers including J. M. Barrie, Noël Coward, John Galsworthy, Harley Granville-Barker and Somerset Maugham. He produced nearly 40 films, and directed 16, mainly in the 1930s, with stars including Gracie Fields.