Berkeley Square House, 4-19 Berkeley Square, Mayfair, London W1J 6BR
This Mayfair restaurant is an offshoot of the Spanish original which caused a sensation when it opened in Madrid. Designed to look like a rainforest, the restaurant looks like nothing else in London. Food is "a blend of tropical and Latin American cuisines" - so that means everything from Peruvian sushi to South American chupe and a lot of Josper-grilled meats.