Much of the area developed into a suburb of London and now the area is mostly built-up with some countryside in the Mill Hill area, such as the Copthall playing fields. Hendon's industry was mostly centred on manufacturing, and included motor and aviation works, and developed from the 1880s. In 1931 the civil parish of Edgware was abolished and its area was added to the great civil parish of Hendon. This meant Hendon covered everywhere from Edgware and Mill Hill down to Golders Green, Childs Hill and Hampstead Garden Suburb.