I want to know the answer to the following question:
Radar was supplemented by what in the 1980s?
All the background I'm provided with is that "Command and control remained primitive until the late 1930s, when Britain created an integrated system for ADGB that linked the ground-based air defence of the army's AA Command, although field-deployed air defence relied on less sophisticated arrangements.". Is that enough to answer the question?
Answer: no