R.O.C, Royal Observer Corps. A large group of people who were employed during the cold war to act as an early detection system in the event of a nuclear strike. I have only ever done two of these and to be honest thats all ill ever need to do, some people get bent out of shape with ROC posts, as if they were the greatest underground relic known to man. Well there not in fact if your break it down its a very small concrete box buried just a few ft below the surface.

The first drain we ever explored. We visited the Wandle drains in two parts. The first being the easier walk in relief in the southern districts and the second being the harder entry heavy as hell manhole in the west.