We took a quick three day trip to England and fitted in a Sunday Lunch at a Vegetarian / Vegan restaurant in London called Manna. We were returning customers (we were there in about 1972).
Just round the corner in Primrose Hill is Sesame, a health food shop that I delivered yogurt to, it hasn't changed (also about 40 years ago).
Then down to Broadstone for a cup of coffee at the Little Red Roaster and a fine meal at Isabel's with Judy, Pat & Timothy.