They're on MOD land. So it's a bit of a chore going to see them as you can't get on the land and they won't disclose what bit of land precisely they are on.
There's special tours you can go on. Sounds a bit of a chore though. And I bet it costs.
( baldmonkey a frothy foul-smelling vaginal discharge, Thu 3 May 2012, 12:06, archived)

you'd end up walking with people wearing bumbags
no way
( spangolin - the odds are good but the goods are odd, Thu 3 May 2012, 12:08, archived)