As usual, a load of cobblers being talked here, along with a lot of sense ... it's obvious who the locals are !
Watch out for the highly trained killer bees they keep in those radomes ...
There is no restriction on the airspace, the place isn't even acknowledged on CAA charts (other than "aerials" if I remember rightly). It was indeed used informally by LBA ATC as a VRP and zone entry/exit until 9/11 (obviously not when they were stacking up 737s ...
) ...