Complex sentence: The British pressed for more fighters and better designs from England, the first of which was the F.E.2b, early examples of which arrived in France in late 1915 and in the new year, F.E. 's began to replace Vickers F.B.5 "Gunbus" fighters.
Split into simpler sentences: The British pressed for more fighters and better designs from England, the first of which was the F.E.2b, early examples of which arrived in France in late 1915. In the new year, F.E. 's began to replace Vickers F.B.5 "Gunbus" fighters.