[2] Reformed on 10 December 1940 from the Wireless Intelligence Development Unit at RAF Boscombe Down operating a variety of aircraft.

After four months work the device was put into service to mark the bomb aim point against Düsseldorf on 1 January 1943.

The squadron continued performing marking duties till the end of the war, including the last raid on Berlin on 21 April 1945.

The squadron was disbanded on 30 September 1945 at RAF Little Staughton it had carried out 5,421 operational sorties with the Mosquito with the loss of 18 aircraft.

With the increase of the V bomber force the squadron was no longer needed and was finally disbanded on 1 February 1957 at RAF Binbrook.