London once held the world’s largest fish market. It might be surprising, being landlocked, but the Thames provided a major thoroughfare for North Sea and Atlantic trade, making east London’s Billingsgate Fish Market a hub for seafood. Nowadays, the fish restaurants London has to offer head to the modern fish and seafood market located close to Canary Wharf on the Isle of Dogs. Fish arrives fresh there daily, supplying London fish restaurants with fresh seafood from ports as distant as Aberdeen and Cornwall. It might be a long haul but it’s a good catch, and it means you can find some of the world’s best fish restaurants in London.