Sushi Tetsu is a seven seat sushi bar and it’s the hardest restaurant to get into in London. With only two sittings a night, plus the fact that you have to ring at certain times on particular days to book, it’s very difficult to actually bag a reservation. Run by husband and wife Toru and Harumi Takahashi, it’s known for serving the best sushi in town though so it’s worth the hassle. Go for the omakase menu and just sit back and enjoy as Toru prepares and serves whatever is best that day.