May 22, 2009, 11:06 GMT
A beach favoured by Princes William and Harry has been voted one of the most polluted in the country.
Rock in Cornwall - an area the princes and their friends regularly frequent - did not meet the basic requirement for water quality, according to The Marine Conservation Society (MCS).
The society added swimming in the sea at the idyllic beach was "not recommended".
Other areas which were blasted by the report included Devon's Combe Martin and Exmouth, North Yorkshire's Staithes and Lancashire's South Morecambe and St Annes.
MCS coastal pollution officer Thomas Bell told Britain's Daily Mail newspaper: "The results reflect last summer's heavy rain which swept waterborne pollutants like raw sewage, petrochemicals and farm waste into rivers and the sea.
"If this summer is like last summer, or even just wet- it doesn't have to be as bad - then things are unlikely to improve.
"MCS is now recommending 25 per cent fewer beaches than three years ago and we're becoming concerned that the existing infrastructure for handling storm pollution may not be up to the job."
In this year's MCS Good Beach Guide, less than half of Britain's beaches were termed "clean".
Rock is well known for its beautiful scenery and relaxing atmosphere. It has been nicknamed Britain's St. Tropez due to the amount of wealthy people who spend time there each year.
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