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All boats kept, used or let for hire on the River Thames must be registered in line with the Environment Agency (Inland Waterways) Order 2010.
If you have a boat and you keep it afloat or use it on the River Thames, you need to register it.
This requirement extends to every part of the non-tidal River Thames between Cricklade Bridge and Teddington Lock, and the short section of the tidal River Thames between Teddington Lock and the Port of London Authority’s boundary, including backwaters and marinas.