• In pictures: The ten cleanest beaches in Britain
The new EU bathing water regulations raise the "pass mark" for beaches around Europe.
They judge water quality on a four-year average, meaning that 25 beaches identified as ‘at risk’ earlier this year due to poor results in previous years were given the chance to make last-ditch improvements to turn things around.
Among them was Teignmouth, where guano from hundreds of pigeons roosting beneath its pier had become one of the major sources of pollution.