The Wallace

The Wallace on Manchester Square is London's nearest equivalent to the Frick, which makes it a brilliant place in my books. It's open every day 10-5pm. Haven't yet managed to go to the new Peyton restaurant there, although it sounds great. They also do afternoon teas (a date option, perhaps?) and brunches. Shuts at 4pm on Sundays but otherwise last booking is at 9.30pm each night.