William Francis Forbes-Sempill, 19th Lord Sempill,, was a Scottish peer and record-breaking air pioneer, who was later shown to have passed secret information to the Imperial Japanese military before the Second World War. Educated at Eton, he began his career as a pilot in the Royal Flying Corps, and then served in the Royal Naval Air Service and Royal Air Force during the First World War. In 1921, Sempill led an official military mission to Japan that showcased the latest British aircraft. In subsequent years, he continued to aid the Imperial Japanese Navy in developing its Navy Air Service.
In 1925 Japanese intelligence asked Sempill to obtain secret technical information about the prototype of the Blackburn Iris seaplane.
Eileen Lavery in 1913
Royal Naval Air Service
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The Royal Naval Air Service (RNAS) was the air arm of the Royal Navy, under the direction of the Admiralty's Air Department, and existed formally from 1 July 1914 to 1 April 1918, when it was merged with the British Army's Royal Flying Corps to form the Royal Air Force (RAF), the world's first independent air force.
Personnel of No 1 Squadron RNAS in late 1914
Commander C. Samson of the RNAS takes off from HMS Hibernia in his modified Shorts S.38 “hydro-aeroplane” to be the first pilot to take off from a ship underway at sea - 9 May 1912.
Sopwith Triplanes from No. 1 (Naval) Squadron, in Bailleul, France. The aircraft nearest the camera (N5454) was primarily flown by ace Richard Minifie.
RNAS officer dropping a bomb from a SSZ class airship during the First World War.