For the days when only a pork bun will do, you need to run, not walk, to Yum Bun. Free range Blythburgh pork, slow roasted then gently fried, is stuffed into a rice bun and slathered with hoi sin sauce, cucumber, spring onions and sriracha. Fortunately for vegetarians and non-pork lovers there's also a veggie option and yummy Asian broths and soups to try. Check them out at Broadway market (Broadway market, London, E8 4QG) on Saturdays and Eat.St King's Cross (King's Boulevard, London, N1C between Pancras Road and Goods Way).