The first squadron to arrive was 247 Squadron with Hawker Hurricanes, specialising in night defence of the South West's towns and ports. The night fighting element was later augmented by 1457 Flight flying Douglas Havoc aircraft with its unsuccessful Turbinlite searchlight tactics. However, the arrival of 600 Squadron with Bristol Beaufighters equipped with Airborne Interception radar produced better results. Ground-controlled interception (GCI) in the area was covered by RAF Treleaver radar station.
