One good thing about London is the vegan Chinese/Thai buffets that are everywhere, it seems. There’s a chain of them, plus a couple of independent ones, and it means that reliably vegan food is never very far away.
Most of them are called either Tai or Veg, and the chain is run by some kind of Buddhist cult. If they’re recruiting, they don’t exactly make any great efforts – you might, if you look, spot the plain A4 notices giving details of meditation sessions and cookery classes, but that’s as evangelical as they get.
The food is not the most fantastic in the world – there’s an over-reliance on fried items, and they definitely like their MSG – but it’s only £5.50 for as much as you can eat in the daytime (I think it goes as high as £6.50 in the evening), and it’s all vegan. No worries about what you can eat, nor about cross-contamination.
The food is Chinese Buddhist, but not monastic grade – onions and garlic are used, and it relies heavily on fake meats made from various combinations of soya, wheat gluten and konnyaku. The fake prawns can be unnerving at times. There are vegan interpretations of sesame toast, prawn crackers, spring rolls (probably the standard Tsingtao brand, beloved of caterers everywhere) and potstickers. There are curries, and a range of stir-fried stuff in other sauces, plus various rice and noodles, though they seem to have stopped providing plain boiled rice. Some of them do vegan duck pancakes.
It is possible to eat healthily – there’s a salad section with plenty of stuff that isn’t fried, including fruit, and a cold, spicy tofu dish.
As with any buffet, is probably best to go at a time when it’s busy enough that the food is fresh, but not so busy that you can’t get anywhere near the counter! There are too many of them to list here, but most of them are mentioned at the Vegan London eating out guide.