The Orangery at Kensington Palace
The Orangery at Kensington Palace has got to be one of the most luxurious spots around, having been originally designed as a greenhouse for Queen Anne in 1704. It's now a vibrant eatery full of plants and decadent white interiors, where you can dig into everything from brunch right through to dinner, with a cracking afternoon tea menu as well. Think courgette risotto, rib-eye steaks and braised lamb shoulder pies, with an extensive wine list to boot.