What Clicker said at Post 6. See here:
Air Defence Radar Museum Neatishead
Edited to add that if you're in that part of the world, La Cupole is well worth a visit - not only because of what it was intended for, but because of what was done to put it out of action. The site was apparently the inspiration for at least one of the James Bond sets and it's easy to see why. UK friendly. See here:
La Cupole Museum
STH