This opened a while ago but I'm not often in Kingston. Lots of very unusual (for Surrey) ingredients. Vast freezers with all sorts of frozen seafood and fish: prawns, scallops, cuttlefish, octopus, tilapia, pangasius, snakehead. Also frozen dumplings from all different cuisines, and things you'd never think to freeze like peanuts. Every kind of rice and noodle, be it precooked, frozen, instant. Many kinds of curry pastes, pickles, vinegars, soy sauces, and bottles and jars of things I'd have no idea how to use. Also a million kinds of dried mushrooms. Lots of imported fresh herbs and vegetables, and loads of Asian beers.
An emporium, you might say. Useful for the things you probably won't find in Waitrose :)