The pudding club is a great place to stay. Scrummy. They encourage walking and there is a section on their website. I went last christmas for a meal and had 7 puddings!! (they were only a mouthful of each though, but you could of had more)
Ok, lots of tempting options here. I think some are tempting enough that I won't end up going off to a european city (which is the other thing I was considering - go to Amsterdam or something for a weekend, instead). But I'd rather train and not fly.