For those of you living in London, or planning on visiting London, the NoisyList.com has a list of 10 diet and health oriented restaurants, including some vegan, vegetarian, and veggie-friendly ones.
Wish I lived there, or was planning a visit. Maybe some day.
You can find the list along with a description of the food here.
Bread Street Kitchen
The River Cafe
Everything from Asian, to Lebanese, to Italian veggie.