If sugar confections are your thing, or eating like Stella McCartney or Kate Moss then afternoon tea in Kensington will be the perfect activity during your stay in London. At Peggy Porschen's Parlour you can tick off all the above and enjoy deliciously freshly baked cakes. If your taste is slightly more American, then the Hummingbird Bakery will serve you very well, branches can be found right across London and as concessions but the one on Church St in South Kensington is a heaven of swirled butter cream topping and light spongy cup cakes. The Goring won the award for London tea venue of the year from the UK tea guild which on top of its 104 year history of serving tea makes it a great place to sample, with tea gathered from the foothills of the Himalayas. At Blakes, you can find almost sushi like boxes of finger sandwiches along with delicious slabs of plum cake, chocolate cake and freshly baked scones with big glass jars of whipped cream, marinated strawberries and jams.
Afternoon tea can also make you feel like a Prince or Princess, so taking tea in Kensington Palace or at the Orangery in Kensington gardens makes for a great London experience. But if you're feeling more virtuous, then Down to Earth will bring you back down to earthy ethical roots and provide a vegetarian or vegan experience of tea and cake.