In message , Roland Perry
wrote:
I wonder if there's a finesse in the expression "tidal", which means
"up to the first lock", rather than "the part of a river whose level is
affected by the tides".

Don't know.

The OS 1:50,000 maps show the Great Ouse as tidal from the sea to
Denver, then non-tidal to Earith, then tidal to Brownhill. The New
Bedford is shown as tidal throughout; the Old Bedford and Delph as
non-tidal throughout. The boundaries are all things like sluices.

--
Clive D.W. Feather | Home:
Mobile: +44 7973 377646 | Web: http://www.davros.org
Please reply to the Reply-To address, which is: