This constant harassment had a detrimental effect on the morale and confidence of many Luftwaffe crews and indirectly led to a high proportion of aircraft and aircrew wastage from crashes as night fighters hurried in to land to avoid the Mosquito threat (real or imagined).

The bomber squadrons of 100 Group utilised various specialist electronic jamming devices to disrupt German radio communications and radar.

100 Group, the British advantage in radar, jamming and Window techniques, combined with intelligent attacking tactics, as well as the discipline and bravery of the RAF crews, have been remarkable.

We had our (sic) severe problems in trying to defend Germany in the air100 Group was formed in November 1943 under Air Commodore Addison at Radlett.

[4] and then made its permanent headquarters at Bylaugh Hall - about five miles from East Dereham - from January 1944, a central location from which to administer the group's airfields in north Norfolk.

No 100 Group operated from eight airfields with approximately 260 aircraft, 140 of which were various marks of de Havilland Mosquito night fighter intruders with the remainder consisting of Handley Page Halifaxes, Short Stirlings, Vickers Wellingtons, Boeing B-17 Flying Fortress and Consolidated B-24 Liberators carrying electronic jamming equipment.

[4] No 223 Squadron's Liberators were ex-American Eight Air Force B-24 H and J models, already well used but long ranged and each able to carry multiple 'Jostle' radio telephony jamming units.