I once spent time in there. I played basketball for the Royal Navy Devonport team and both home and away fixtures had to be held within HMP Dartmoor. The gym had a number of vertical iron pillars which inhibited smooth play, and the opposition were incredibly fit and not seemingly not that aware that physical contact was shunned. To be honest it felt rougher than rugby.
Ha Ha, up here in Worcestershire, semi serviced pitch water pipe on every pitch, ( grey water into the hedgerow) pub 400 yards away. £15 a night. . The Turbles.