Next summer, I'm going to be spending time in London (1 week), Oxford (2 weeks), Cornwall (2-4 weeks) and Limerick, Ireland (2 weeks). Aside from restaurants and fresh markets (which I'm researching separately), is there any food-related sightseeing in those areas? In other places, I've found food museums (pasta, sea salt), small-production tours (oystering, mushrooms, chocolates), etc. Not interested in a long cookery course, but a half- to full-day one would be fine. Any ideas?