Street and regional Thai influenced food.  In this type I rate Smoking Goat and Som Saa as some of the best in London. 

I went to the Shoreditch outpost.  Lack of tea was the only mistake.  (Som Saa do a lovely cold oolong tea which is great for taking the edge off a spicy mouth) 

You can find them at 64 Shoreditch High St and website here http://smokinggoatbar.com/shoreditch/