Haven't been to Bewl Water for 20 years, but have very poor memories of it.
Hired a boat with outboard with my Dad for some fly fishing. Managed (through ignorance) to drift into a forbidden area near the fish pens, which they hadn't told us about when we hired the boat.
A warden type came steaming out on his boat and was incredibly rude. Instead of just talking sensibly and asking us if we knew the rules and could we move on, ranted on and told us we had to come in straight away. Vowed never to go back, and never have.
Maybe if you're a member and part of the scene it's ok.