Complex sentence: F.P. Raynham (1893--1954) was a British pilot from the early days of aviation, gaining his aviator's certificate in 1911 and test-flew Avro, Martinsyde and Sopwith and Hawker aircraft before and after first World War.
Split into simpler sentences: F.P. Raynham (1893--1954) was a British pilot from the early days of aviation, gaining his aviator's certificate in 1911. He test-flew Avro, Martinsyde and Sopwith and Hawker aircraft before and after first World War.