What annoys me the most about the toilet issue, is that most of the worst toilets are located in the successful pubs. It really doesn't cost a lot to ensure there's a modest amount of toilet blocks in the gents loos. Even better is to get a plumbing firm in to fix the drains. Here's my list:

The Ship and Mitre Liverpool
Flowerpot Derby
The Boathouse Wylam
The Criterion Leicester