About TMBA

The Thames MotorBoaters Association (TMBA) is an association of owners of powered vessels registered with the Environment Agency for use on the River Thames between Lechlade and Teddington.

The Association will also accept as associate members any other individual, association or corporate body that shares common interest in the aims of the Association.


The TMBA is NOT a boat club or general discussion forum. Its only function is to represent members interests, and provide a point of consultation, with the people who manage the waterway, with particular regard to navigation, moorings and other related issues that affect our enjoyment of the river.

We aim to provide a dialogue between ourselves, as users,  and the Environment Agency who manage the non tidal Thames river from Lechlade to Teddington. Our interest is primarily in matters which affect the use of the river by power driven vessels – e.g. navigation, moorings, lock services etc. although we hope we take a responsible and considerate view of the needs of all those who use and enjoy the river.

Membership of the TMBA is open to any individual owning or using a motor boat registered with the Environment Agency for use on the Thames. Anyone can read site content  but you must register as a member before you can participate in discussion or request information.

If you do not qualify for membership but would like to support us with a small donation you can do so HERE