Cheers Sam, Had no chippy tools on me, so could not consider trying to fix it and was heading back home ( 150 miles away ) today. Otherwise would have tried to sort it out.
We were not the only people in there on Sunday. There was a white VW van with a very nice canoe roof rack on top. They must have must have been down the dungeon because it was rigged when we went in but not when we came out.