Ate here twice (June 2012) both times the friendly owner did her best to describe everything to us which was sweet! We were veggie at the time, so I wasn't paying attention to dairy/egg content, but to be honest she has SO many options on her buffet cart I'd go here regardless as many of them will be vegan by default.
The food was lovely- a mixture of mock meat, veggies, tofu, curries, noodles, etc, definitely something for everyone. She just looks at what you've got and says a price- for us it was about Â£1 per full plate of buffet. An utter bargain, so we gave her more and let her keep the change, I was happy to pay more!
It's in a food court on the 2nd or 3rd floor where most the food is, so take your time to find it. I think there are TWO veggie stalls in here from memory, but we only ate at this one.
I think she did close at 4 or 5pm, so we came once for lunch and once at the end of her day as an early dinner and stuffed ourselves silly!
Cons: can be hard to find, shuts around 4/5pm