We went again yesterday. The manageress was in her usual rude state and refused point blank to give Charlotte a glass of tap water, stating that she'd have to get bottled water and they couldn't give her tap water as they didn't have a tap, despite us spending over £10. Charlotte argued that it's illegal not to give tap water on request and eventually a glass of water did appear. This upset one of their staff so much that she (not the manageress) came up and apologised to us later on, despite the fact it was absolutely no fault of her own.
I think this may well be the last nail in the coffin now.