Row over possible River Cam bathing spot frequented by Darwin and Lord Byron

Proponents of bathing waters' designation say it would force action on sewage but others worry about impact of more visitors

The waters of the River Cam are an unsettling lurid green on a dull day. The river that flows through Cambridge and has been enjoyed by swimmers including Lord Byron, Charles Darwin, Virginia Woolf and Roger Deakin is increasingly polluted from sewage discharges and phosphates and nitrates from farmland.

Now swimmers hope that the government designating a short stretch of the river at Sheep's Green as bathing waters" will provide the impetus to clean it up.