The main building in the photo is the 'Happidrome' or Ops Block for the Final GCI station. The building on the right was the Stand-by Set House. As far as I know there is only one air raid shelter on the site, a pre-cast concrete affair that I'm fairly sure dates from the 1950s. The plinths for the Type 13 and 14 centimetric radars survive in good condition, as does the IFF cubicle and tower base. As the only Final GCI ever completed in Scotland (the one at Fullarton in Ayrshire was under construction, but cancelled before being finished), it is good that these buildings have survived, but a shame they've been altered.