If you have a flat and no spare, they will sent a contractor to pick you up and tow you to a garage, problem is AA have no garage partners, so the contractors arrange to tow you to a garage they are partnered with, and that garage will rip you off as you have little to no recourse. The towing contractor told me he was doing me a favour towing me to a tyre place in Leeds as it was 12 miles away and my policy only allowed for 10 mile radius tow to a safe place, however we passed several tyre places on the way, I'de just spend about an hour in the cold on the side of the motorway so I didn't bring it up, but after the tyre place tried to rip me off 150 for an off brand tyre, it wasn't hard to put the pieces together. Moral is have a spare tyre lol, and don't use the AA