Hamilton, along with Geoffrey de Havilland, Hubert Broad and others, was a founder member of the British Private Aircraft Owners' Club on 17 February 1926. During the General Strike in May Hamilton was one of the pilots taking part a scheme organised by the Royal Aero Club to deliver newspapers by air. Hamilton also entered the 1926 King's Cup Race, but was obliged to withdraw as his engine was not ready in time.