Perched up on the dizzying 42nd floor in the old Natwest Building is a small Champagne bar boasting some of the most unrestricted views of the city. It’s the highest bar around, so it’s no surprise that your drinks will come with a lofty price tag (kicking off at 14 quid), and like any place with views this good it can get a little touristy at times, but grab yourself a seat by the window, steer clear of the cocktail menu, stick to Champagne, and suck up that view (but forget your flip flops otherwise you won’t get in).