Europe's largest urban wetland nature reserve, reopened to the public in 2017, sits across a chain of Thames Water reservoirs in the Lea Valley. Bream and carp are the headline species from the reservoir banks, alongside herons and cormorants working the same water — a permit from the Wetlands covers fishing across the reserve.
See Walthamstow Wetlands and 0 more London fishing spots — or add your own discoveries.