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The River Thames is the deepest, Ignore the previous answer of 'Kiki' it doesn't exist in Great Britain. The Thames depth really does vary though. In the upper reaches, lets say from Marlow upwards, the main channel varies from about 6 feet to 25. Below the bridge stanchions it is ofcourse deeper and the closer you get to the sea the deeper it gets. Of course there are minor channels where the water depth varies from 3 foot to 12 foot, also the time of year affects depth too.

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13y ago

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