 In the late 1960s it became a Master Comprehensive Radar Station trialling the Ericsson 'Fire Brigade Auto Intercept Radar System' and later going on to house a massive Elliott & Plessey computer system for the 'Linesman Radar Project' All Radar functions at the site eventually closed in 1974 and for the next few years the site was used for training.In the 1980s, the Bunker was converted to form the new Emergency War Headquarters for RAF Support Command.However with the end of the Cold War in 1991 this function ceased and the site returned to training until 1994 when it was given a major refurbishment to become the first experimental (trialling) headquarters for the new UK Air CCIS system Electronic Warfare Advanced Communications System.