Complex sentence: Brought up by his mother and grandparents, he moved to Clapham, south London, in 1907 and attended a London County Council school before going to work as a trainee surgical instrument maker at Bart's Hospital.
Split into simpler sentences: Brought up by his mother and grandparents, the family moved to Clapham, London, in 1907 and attended a London County Council school. On leaving school, Allingham started work as a trainee surgical instrument maker at Bart's Hospital.