Flemings Mayfair, 7-12 Half Moon St, 7-12 Half Moon St, London W1J 7BH
The main restaurant inside the Flemings Mayfair hotel, Ormer is now run by Executive Chef Sofian Msetfi (previously at Adare Manor and The Hand and Flowers). It uses seasonal produce from the UK and also has its own kitchen garden in Essex. That's all used in a solely tasting menu experience (and they have vegetarian and vegan options too).