Scientists issue jellyfish warning after more than 30 wash up on south-west coast

Scientists have issued a warning after dozens of deadly Portuguese man o'war jellyfish - the most venomous in the North Atlantic - washed up on beaches in Cork and Kerry.

At least 30 of the distinctive jellyfish have washed up on the south-west coast in recent days. Their sting is excruciating and in some cases can be fatal.