I am so excited to be staying in London properly, want to kick this thread back into life.
For lunches I normally go to Wasabi and have the tofu noodles or tofu rice pretty big tub of calories for less than a 5'er.
Had hummus sandwiches from Pret a few times, but they seem to have take them off there Autumn menu. Standard lunch backup is the boots lunch special with there hummus sandwich.
Came across this which could potentially be a gem, will report back once I try it.
The Larder in Bethnal Green do a soya crepe filled with curry! They might be able to do a sweet version if that was what you were looking for..
Now the important question is, has anyone found vegan doughnuts in London?