Complex sentence: Alex Henshaw, chief test pilot at Castle Bromwich from 1940, was placed in charge of testing all Spitfires built at that factory, co-ordinating a team of 25 pilots; he also assessed all Spitfire developments.
Split into simpler sentences: Alex Henshaw, chief test pilot at Castle Bromwich from 1940, was placed in charge of testing all Spitfires built at that factory. He co-ordinated a team of 25 pilots and also assessed all Spitfire developments.