The Knightsbridge in, where else, London's swanky Knightsbridge is situated in the Sheraton Park Tower Hotel. The height of civility, the restaurant is decorated with in yellow and gold with glittering candelabras and plush sofas. You can have lunch here until 3pm and enjoy afternoon tea from 3pm until 6pm. Afternoon tea can consist of pastries, fruits, Madeira cake, sandwiches, freshly baked scones with jam and clotted cream - and of course tea! This slice of decadence only costs £25 per person and is a real, traditionally British, treat.