The Closedown
Along with much of UK Civil Defence policy, planning and provision, the WTBS, by now renamed the more friendly sounding "National Broadcasting Service" was shut down in 1992 as part of the "peace dividend" resulting from the collapse of the Soviet Union.
The BBC Facilities
The Stronghold, underneath Broadcasting House extension (BHXX) ,was demolished in 2008 when construction of New Broadcasting House commenced.
It took explosive charges to remove the mass of rebar and concrete that formed it.
A post-World War 2 Ministry of Works report said it would have withstood the explosion of a Hiroshima sized atomic weapon.
Civil Defence Bunkers
Most of the regional bunkers stood on standby for a number of years after closure before being decomissioned and then largely stipped of their internal fittings.
Some, such as Hexham and Lougborough were demolished, whilst others became museums , data-farms and even a bonded warehouse wine cellar!
“The (222) Committee was being wound up, and I got the impression that some of its members were rather sad about this. They had devoted a lot of their time to it. A BBC drinks trolley was wheeled in, and we toasted the demise of the WTBS.”
Paul Reynolds - BBC staff and 222 Committee member