Wales recorded the highest density of beach litter, with more than 2, 600 items found on every kilometre of coastline surveyed, followed by England, Scotland, the Channel Islands and Northern Ireland.

BBC: NEWS | UK | Wales | Welsh beaches are most littered

The Peruvian Sea Institute surveyed about 43 miles (70km) of beach coastline on Sunday and estimated that 592 birds were dead along the shore.

CNN: Peru investigates mystery pelican deaths