It is just over a week-and-a-half since Henry O'Donnell donned his flippers and snorkel for a remarkable challenge.

The 56-year-old former army ranger turned security consultant took to the sea at his local beach at Carrickfinn in west Donegal with the aim of becoming the first person to fin-swim solo around Ireland.

Today, Henry took off in his support boat from Malin Pier to pick up swimming where he left off yesterday and on this latest leg of the expedition he rounded Ireland's most northerly point, Malin Head.

The swim, which is going clockwise around Ireland, could take up to a year to complete depending on the weather and the sea conditions, which Henry says can be challenging, particularly on the west coast.

The swim can be tracked on where donations can also be made to the two charities which are being supported by the challenge, Water Safety Ireland and the Irish Cancer Society.