Thanks for this thread. I must said that I've only been once in UK, as poor recently graduated Spanish biologist attending to a workshop in St Andrews.
However, I must admit that on that trip, I discovered Kippers, and I love them (I sometimes found them here down under from Scotland, frozen, and I empty the market supplies, of course). I also love other products like Worcestershire sauce (in spain we use to call it "Salsa inglesa", just British sauce) and Shropshire and Stilton cheeses. I certainly appreciate these products that I can associate clearly to Great Britain, and I am sure there are much more, some already in the thread, sometimes I use HP sauce, and the mentioned cox's orange pippin are my top apples, locally grown here in Tasmania in smallish numbers.
However, I don't have in my mind an idea of how British cuisine is, compared with the idea of french, Italian, middle eastern etc... It does not mean I know a lot about these cuisines, but I have traveled there, and I have eaten in styled restaurants all around the world, and everybody seems to know what to expect in an Italian, Greek, or Indian restaurant.
However, such a thing as a "British restaurant" is something that does not exists as a concept, I reckon. Closest thing to me would be the Pubs, that I often visit here in Australia, but still, a pub meal with a couple of pints is something to "random" to me for considering it as a British representative. Most recipes I've seen around are largely unknown out of UK
It is great to see all the discussions here, including historical references. I hope those with more knowledge keep talking about British food, so others can enjoy and learn.
cheers
Fer