In reply to georgehumphery:
As far as I'm aware, the Leeds Wall is the only proper wall, the others (Citybloc and Depot) are bouldering centres. Around Leeds you've also got Harrogate Wall which is OK and Rokt at Brighouse which has a lot of character.
The Leeds Wall is excellent. Generally well set routes, and very steep with very stiff grades on the main wall (but not elsewhere - the route setters don't seem to take steepness into account in grading) which is good for training. You think you can't climb 6b, but actually you're cruising 6c anywhere else!