Henshaw's early ambition was to race motorcycles, and he harboured dreams of competing in the
Isle of Man TT Races. However after watching a
biplane swooping low over the sea, he decided that he wished to learn to fly He later acquired
Percival Mew Gull G-AEXF, with which he won the inaugural London-to-
Isle of Man air race in 1937. Following extensive modifications by
Essex Aero, he flew it to victory in the 1938 King's Cup, flying at a record average speed of 236.25 mph. Henshaw then turned his attention to long-distance flying. After reconnaissance of the eastern and western routes in 1938, he set off from
Gravesend at 0335 GMT on Sunday 5 February 1939 to fly his Mew Gull to
Cape Town and back. He refuelled on the way out in
Oran in Algeria, crossed the
Sahara to land in the
Belgian Congo and then
Angola, landing at
Wingfield Aerodrome Cape Town after flying 6,377 miles in 40 hours. He spent 28 hours in Cape Town, and retraced his route back to the UK, landing on 9 February after a flight of 39 hours, 36 minutes. He experienced hazardous landings at remote bush airstrips, battling through a tropical storm, and overcoming extreme exhaustion on the return leg. He completed the whole 12,754-mile round trip in 4 days, 10 hours and 16 minutes, breaking the record for each leg and setting a solo record for the round trip. By the end, he was so tired that he had to be lifted out of the cockpit. His account of his air racing career is given in his book
Flight of the Mew Gull (1980) The Cape record stood for more than 70 years. On 11 May 2009,
Charles Stobart, flying a homebuilt Osprey GP-4, set a new record ratified by the FAI for the reverse route, Cape Town – London – Cape Town. Subsequently, on 3 September 2010, Steve Noujaim, flying a homebuilt Vans RV-7 supported by Prepare2go, landed at
Southend Airport in the UK after completing a round-trip to Cape Town in 3 days, 11 hours and 16 minutes. The new record bettered Henshaw's time by just over four hours. G-AEXF was restored to its Cape flight configuration in the 1980s. It remained in flying condition at
Breighton in Yorkshire until Feb 2013 when it was purchased by The Shuttleworth Collection. The
Royal Aero Club awarded Henshaw the
Britannia Trophy for his record flight. ==Second World War==