The Outsider Tart folks recently expanded into the adjacent space next to their bakery. The bakery has a good selection of American cakes, cupcakes and brownies and decent coffee too. The new space is a small cafe that does a GREAT brunch. The menu is interesting and I had the best American pancakes that I've had in London so far. There's also a good egg dish similar to huevos ranchero. Portions are not American sized though, they were a bit small.