RAC, had an excellent service by them recently when my wife's wheel bearing fell to bits. Patrol man took the hub off and pressed out the bearing while I nipped to ford for a new bearing, he then took the hub away to a garage to press a new bearing in, came back, put the car back together, drove to my wife's work, picked her up, dropped her back to her car and followed her for a couple of miles to make sure she was happy with it.
I paid around £150 last year and just had my renewal through, think it was £69 for both of us for the year, roadside and relay. Certainly can't argue with that!