Thanks, Bunnahabhain

Since I posted that earlier, I've realised I'd had a browse round the official website recently, without realising that Kelvdon Hatch was where that roadsign referred to!

Yeah there are lots about, but thats the biggest it seems, being intended for Central Government.

I grew up 'in the shadow' of the Cold War, you might say, & the most noticeable thing vaguely up in my part of the world were the high-profile & somewhat 'iconic' radar domes of Fylingdales.