William Humble MBE (14 April 1911 – 1 March 1992) was a well-known pre-Second World War aviator, known as an air racer and for his aerobatic displays. He was also an officer in the Royal Air Force Special Reserve, and the Auxiliary Air Force. Although he qualified as a mining engineer the lure of flying proved too strong, and he did not enter the family mining company. During the war he became an important test pilot for aircraft manufacturer Hawker Siddeley. Having tested some of the early jet aircraft, he retired from test flying in 1948, becoming a sales executive for Hawker. He was the grandfather of British television presenter, Kate Humble.