Complex sentence: Following this refusal, Levy worked his passage to Britain as a member of the "black gang" on a steamer, There he rejoined Wintringham and was involved in establishing the private training school for Home Guard volunteers at Osterley Park.
Split into simpler sentences: Following this refusal, Levy worked his passage to Britain as a member of the "black gang" on a steamer. After arriving in Britain, he rejoined Wintringham and was involved in establishing the private training school for Home Guard volunteers at Osterley Park.