Why Britain used manned electronic-warfare decoys

Why did Britain not use target drones as decoys to distract fighters from bomber raids?

The scale and control problem made drones unattractive, while manned support aircraft using jamming and chaff already performed the deception mission.

Convincing the Luftwaffe that a major raid was under way could require hundreds or thousands of apparent aircraft. Jammers and chaff could magnify a formation, but creating and controlling enough target drones would add complexity to an already crowded air picture. Britain instead used manned support aircraft, including converted types obtained from several sources, to conduct electronic warfare and deception. The discussion points to No. 100 Group as the organisation that concentrated much of this specialised work.