Not having visited Thailand, I can't judge the literal truth of that, but I've been disappointed before by Thai food in Oxford and wanted to see if I could do better. The interior of Bangkok House is less 'identikit minimalist' (as certain other Thai establishments round here are) and more The King and I: lots of sandalwood panelling, lights and ornaments, and some very unusual carved tables make it feel cosy and pleasantly kitsch.*
Main courses were also of a high standard: my prawns in garlic and pepper (Goong Tord Gra-Tiem; £8.50) looked slightly meagre and unpromising but proved to contain plenty of flavourful prawns in a sauce that combined umami and subtle sweetness and was nicely offset by the plain rice on the side. The Photographer's chicken with basil (Gai Pad Ka Prow; £8.50) was super-spicy, as billed, but well balanced all the same.
Fullness got the better of curiosity and we passed on the not-very-westernised dessert menu. Perhaps that was a shame, as this was certainly a very good meal, with which we couldn't find much fault (although the service was efficient but a bit grumpy, and downright idiosyncratic at times - be advised too that there's a 5% discount for paying in cash). It seems that the world's smallest Chinatown isn't a bad place to go for Thai food.
42A Hythe Bridge Street
* It turns out the building itself has a distinctive history.