WATER chiefs have warned those enjoying the summer against cooling off with a dip in the Thames.

The Port of London Authority (PLA) advised anyone thinking about swimming in the river outside accepted bathing resorts could be risking their life.

PLA spokesman Martin Garside said: “Even on a warm day, the water temperature can be much colder than you think.

“The tidal currents are also much stronger than most people realise.

“Even a good swimmer could easily get into difficulties.” He added: “In the Gravesend area there are a large number of large commercial vessels which can create a wash which can easily take a swimmer unawares.

“More generally, there is the problem of access to the foreshore.” He warned against walking on the river shore because of the danger of getting cut off by fast-moving tides.