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The river above Teddington Lock is governed by the Environment Agency<ref>http://www.environment-agency.gov.uk/subjects/navigation/747415/150319/?version=1&lang=_e</ref>; from Teddington Lock to the sea by the Port of London Authority<ref>http://www.portoflondon.co.uk/</ref>.
The river above Teddington Lock is governed by the Environment Agency<ref>http://www.environment-agency.gov.uk/subjects/navigation/747415/150319/?version=1&lang=_e</ref>; from Teddington Lock to the sea by the Port of London Authority<ref>http://www.portoflondon.co.uk/</ref>.
The Thames is home to a wide variety of wildlife including, most famously, a large number of swans. All unmarked mute swans on the Thames belong to the monarch and a swan census, known as the Swan Upping, is held every year to determine their numbers.
==References==
==References==