Aircraft of 100 Group: A Historical Guide for the Modeller
No. 100 Group was a special duties group within RAF Bomber Command. It was formed on 11 November, 1943 to consolidate the increasingly complex business of electronic warfare and countermeasures within one organisation. The group was responsible for the development, operational trial and use of electronic warfare and countermeasures equipment. The group was a pioneer in countering the formidable force of radar-equipped Luftwaffe night fighters, utilising a range of electronic 'homers' fitted to de Havilland Mosquito fighters which detected the night fighter's various radar and radio emissions and allowed the RAF fighters to home in onto the Axis aircraft and either shoot them down or at the very least disrupt their missions against the bomber streams. Other Mosquitoes would patrol around the known Luftwaffe fighter airfields ready to attack any landing nightfighters they came across.