KillerOnion:
It's just to the east of Gatwick airport, south of London.
From junction 6 of the M25, go south down the A22 until you reach a large roundabout where the B2028 crosses (Just off this roundabout is a large spire, part of the Mormon (?) temple, hence the site's name). Turn west down the B2028 (signposted to Copthorne I think), then take an almost immediate right (up Bones Lane). Keep following along this road (you'll come to a Y-junction, take the left hand fork) & eventually you'll pass a timber yard on your right, a bit further down the road is a sharp right-hand bend, the entrance to the site is on the left-hand side of the bend. There's usually an "Adventure Paintball" sign just outside the gate. The gate should be unlocked (if not phone Clive!) & after you go through it you must close it again to avoid the horses around the site from escaping onto the road.