 Tizard put his thoughts in a 27 April 1936 letter to Hugh Dowding , who was at that time the Air Member for Research and Development . He also sent a copy to Watt , who forwarded it to the researchers who were moving to their new research station at Bawdsey Manor . In a meeting at the Crown and Castle pub , Bowen pressed Watt for permission to form a group to study the possibility of placing a radar on the aircraft itself . This would mean the CH stations would only need to get the fighter into the general area of the bomber , the fighter would be able to use its own radar for the rest of the interception . Watt was eventually convinced that the staffing needed to support development of both CH and a new system was available , and the Airborne Group was spun off from the CH effort in August 1936 . 
