
Talking Strategy S6E14: Force Integration in 1940: Dowding's Air Defence System
Mar 24, 2026
Andrew Renwick, curator of photographs at the RAF Museum Hendon and author on RAF history, explains how Hugh Dowding built Britain’s integrated air defence before WWII. He walks through radar adoption, intelligence sources like Enigma, and how decentralized command and experienced fighter leaders made the system function. The conversation highlights doctrinal clashes, the Big Wing debates, and Dowding’s lasting legacy.
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Dowding Backed Radar From The Start
- Dowding personally championed early radar trials after Robert Watson-Watt's 1934 approach and established trials in 1935.
- Successful trials quickly moved radar from experiment to operational deployment under Dowding's watch.
Integrated Detection To Directed Interception
- The Dowding System combined detection, interpretation, and interception into one integrated chain.
- Radar, Y Service, Bletchley Park and the Observer Corps fed a filter room whose plots directed fighters to targets via delegated sector control.
Delegate Authority To Sector Commanders
- Delegate authority to the lowest competent level so local commanders can act without HQ micromanagement.
- Dowding let sector commanders and group AOCs run engagements while HQ provided the operational picture and guidance.

