Onchan born Phil Marshall has completed an ultramarathon dubbed Britain’s Most Brutal.

Mr Marshall spent six and a half days running almost non-stop 268 miles across mountains, moors and flooded rivers to raise money and awareness for Pulmonary Hypertension Association UK, seeking to find a cure for a terminal disease his wife Sarah suffers from.

Mr Marshall said: ’I was battling extreme winds, waist-deep snow, torrential rain and sleep deprivation.’

He completed The Montane Spine Race in 155 hours and 25 minutes.

On the first day of the race, competitors had to contend with nearly 24 hours of constant rainfall which flooded fields and made crossing rivers all the more dangerous.

The second half of the ultramarathon saw the weather get worse with the race continuing through heavy snowfall, sometimes getting waist deep, with the weather making navigation near impossible.

Only sleeping 10 hours throughout the entire event, Mr Marshall says he began to suffer from hallucinations and due to the lack of vision he walked into a snow covered pond.

On the forth night of the race, organisers took the unprecedented step of halting the race for six hours, leaving Mr Marshall and his fellow competitors to find cover while the worst of the weather passed.

He said: ’That night I hunkered down in an abandoned stone building near the summit of the highest peak on the route.

’The weather was the worst I’ve ever seen in this country.’

On other occasions he slept for an hour at a time in other unlikely places, such as empty barns, an unlocked church, behind dry stone walls and even in public toilets.

The course runs along The Pennine Way, one of the most physically demanding of Britain’s National Trails.

This includes participants crossing the Peak District, Yorkshire Dales, Northumberland National Park, Hadrian’s Wall and the Cheviots before finishing at the Scottish border.