Complex sentence: The first flight took place on 25 August 1952 and the F.1 entered service with No.56 Squadron RAF in February 1954, becoming the RAF's first swept-wing aircraft.
Split into simpler sentences: The first flight took place on 25 August 1952. The F.1 entered service with No.56 Squadron RAF in February 1954, becoming the RAF's first swept-wing aircraft.