Complex sentence: Turner was born and raised within the suburbs of Harrow, Middlesex, during the Second World War, he became interested in aviation and those of the Royal Air Force and drew aircrafts in his school exercise books which infuriated his teachers.
Split into simpler sentences: Turner was born and raised within the suburbs of Harrow, Middlesex. During the Second World War, he became interested in aviation and those aeroplanes of the Royal Air Force and drew aircraft in his school exercise books which infuriated his teachers.