Night  of 27- 28 January 1943.

162 aircraft (124 Lancaster, 33 Halifaxes, 5 Mosquitoes raid Dusseldorf.

First occasion when oboe Mosquitoes carried out ‘ground marking’ for the pathfinders

3 Lancasters and 3 Halifaxes lost

Mosquito B Mark XVI, ML926/G, fitted with a ventral radome, in flight while testing H2S radar with the Telecommunications Flying Unit based at Defford, Worcestershire. This aircraft was also used by the TFU to test radar bombsight and 'Oboe' repeater equipment.
IWM MH 4647