So for the Waffle Toffee Crunch score: We were there eight days (Saturday to Saturday) and I was able to have a Waffle Toffee Crunch dessert seven of the eight days! They only day I didn’t succeed was the day we left for Cardiff. In my defense we were on the way to the train station before Garfunkel’s opened and they didn’t appear to have any in Cardiff (they few people I asked didn’t even know what Garfunkel’s was).
So I consider the dessert portion of the vacation as much of a success as possible :)