Complex sentence: Alexander Walter Merrison, born in Wood Green, London on 20 March 1924, initially attended Tottenham Grammar School and subsequently Enfield Grammar School, before going on to King's College London (which had been evacuated to Bristol during the Second World War) graduating B.Sc.
Split into simpler sentences: Alexander Walter Merrison was born in Wood Green, London on 20 March 1924. He attended Tottenham Grammar School and then Enfield Grammar School, before going on to King's College London (which had been evacuated to Bristol during the Second World War) graduating B.Sc.