WW2 Butlins 21 Club servicemen 21st Army Group leave centre badge

Probably one of the rarest and inconspicuous Butlins Holiday Camp badges known!
A good original Second World War period 'Butlins 21 Club badge' in the form of a gilded brass shield inlaid with red enamel, bearing continental 'Crown' and pin fittings, the centre inscribed "21 Club" within three white stars. Very good condition, retaining original pin fittings, enamel perfect.
Height 27mm.

Late in the war, during the Allied advance through western Europe following the Normandy landings, Butlin was approached by General Bernard Montgomery, who asked him to help set up leave centres for the 21st Army Group. Starting in Brussels, the "21 Club" concept quickly spread through western Europe, providing entertainment and relaxation for servicemen and women. In 1944, Butlin was awarded the MBE for his wartime service to the Ministry of Supply.