Complex sentence: Gerry Sayer flew Britains maiden jet flight in Sir Frank Whittles Gloster E28/29 (Pioneer), an aircraft designed by George Carter, on 15-05-1941, but was believed killed flying a Hawker Typhoon 28 September 1942.
Split into simpler sentences: Gerry Sayer flew Britain's maiden jet flight in Sir Frank Whittle's Gloster E28/29 (Pioneer), an aircraft designed by George Carter, on May 15 1941. He was believed killed flying a Hawker Typhoon 28 September 1942.