Warwick uni has bouldering.
Then you're looking at Birmingham I believe.
Creation in Moseley is reasonably easy to get to. Follow A45 to the blues ground, take 1st exit on roundabout, then 2nd, 2nd and it's about a mile on left opposite lidl.
There's a new wall near snow hill station too but I've never been as I've moved away.
There's also red point wall near Aston uni.