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BUILDING 4 : Anti-Aircraft Operations Room (AAOR)
BUILDING 40 : Hillingdon House
Hillingdon House / HQ Air Defence Great Britain (ADGB) / HQ Bomber Command / HQ 11 Group / HQ Military Air Traffic Operations (MATO)
BUILDING 83 : UNITER Building
BUILDING 145 : Theatre
BUILDING 146f : Barrack Block (Sulva Block)
On 9 January 1981 the IRA planted a bomb inside Sulva Block and this detonated causing substantial damage to the building. The centre front elevation and parts of the roof needed rebuilding, you can see the newer red bricks where this was done. Thankfully there were no casualties.