The Wandle, once dubbed a "sewer" because of waste from tanneries flowing into it during the industrial revolution, was cleaned up by environmentalists.
BBC: NEWS | UK | England | London | Toxic spill in river kills fish
2.
The 14km long River Wandle flows through south London, starting at Croydon it passes through Sutton and Merton before joining River Thames at Wandsworth.
BBC: NEWS | UK | England | London | Toxic spill in river kills fish