The visit of HM King George VI to No 617 Squadron (The Dambusters), Royal Air Force, Scampton, Lincolnshire, 27 May 1943 – The King inspects ground crewmen lined up beneath the nose of Avro Lancaster B Mark I, ED989, DX-F, ‘Frederick III’, which bears a motif derived from a caricature of Wing Commander Campbell Hopcroft, the Commanding Officer of No 57 Squadron which shared Scampton with No 617 Squadron at this time.