P Franco, wine shop, bar and restaurant. Amazing wine, delicious small plates (guest chefs) in a very lively atmosphere. The wait for a spot to sit down is worth it.
On a hot day there is nothing better to do in London then go for a swim in the Heath ponds. You get completely transported you out of the city as Hampstead feels like being in the countryside except you're in central London?!
An unassuming glass door on an otherwise plain facade hides a cavernous space, with high ceilings and huge sliding partitioned walls producing excellent exhibitions in a space you'll want to go back to.