Not the most exciting place inside, but a lovely rooftop area which not all that many people seem to know about, 2 mins walk from Old St station. If it’s packed then The Red Lion is just up the road.
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?!
There are many great parks in London to choose from, but Hampstead Heath is by far my favourite; a lido, Parliament Hill with a great view of the city, ponds, woods and plenty of space. It’s a great place to hang out in the summer, but also presents a lovely walk in the winter. Address: (As it’s so big obviously it doesn’t really have a specific address but there are 2 main entrances) Entrances by Gospel Oak or Hampstead Heath Entrance.
Spacious bar and dining place with a scandinavian feeling to it. Different independent shops like record shops, flowers, etc inside the place. Pizza is good!
Forget Selfridges or Liberty! Fenwicks Contemporary Womenswear department has the biggest selection of Sonia Rykiel this side of Paris, amongst other great labels such as Thomsen, Dagmar, Les-Prairies-de-Paris and See by Chloe. But the best thing about it – it's quiet!