A coastguard team in Cornwall said it received several 999 calls concerning sea swimmers who were shouting for help.

Falmouth Rescue Coastguard team said the swimmers off Battery Rocks, near the Jubilee Pool in Penzance, found themselves lost in the fog on Sunday morning.

Jill Rylance from the team said a local vessel was able to escort the swimmers back safely to shore.

"If you are going to go for a swim, be mindful of the visibility," said Ms Rylance.

She said: "Keep the shoreline in sight if you do go swimming but also make sure you can be seen and you have a bright tow float or a bright coloured swim cap."

Ms Rylance said it was easy to become disorientated in these conditions and advised people to check the weather forecast before going out either on or in the sea.