In reply to Moley:
> I do wonder about those trig points that are on MOD land, might have been interesting and his running background may have come in useful
Funnily enough a friend (not Rob) and I once decided we'd like to visit the trig point that's inside the TA base in Dundee. We thought we'd better do it properly (to reduce the risk of getting arrested or shot), so we presented ourselves at the sentry box and tried to explain what we wanted. The bloke on duty seemed to semi-grasp what we were after, and knew what we meant by the trig point across in the corner of the yard - but it wasn't within his gift just to let us in, so he phoned his commanding officer. When he said "Sir, I've got two civilians at the gate" this amused us no end. In due course we were escorted 50 yards or so to the trig, and it was all very amicable.
Suspect Rob did something similar with that one, but the trig on a seriously fenced-in hillside above the Coulport MOD base might have required more furtive tactics:
http://trigpointing.uk/trig/4620