199 Sqn, 100 Group, RAF - RAF North Creake, Norfolk, UK, from September 1944 to February 1945.
The unit was employed during this period on radio counter-measures operations, covering and simulating night bomber missions; the Mandrel electronic jamming device was carried to counter the German Freya early warning radar, and tin-foil Window strips were dropped to confuse Wurzburg fighter ground control and night fighter AI radar.