A High Wycombe man is “over the moon” after he completed a mammoth 100k walk to raise money for charity.

Martin Clark, 50, walked from London’s Putney Bridge to Henley-on-Thames in just under 25 hours, raising £1,800 for the MS Society which he says has helped his stepdaughter, Sarah Witney, 45, with the chronic condition which has left her paralysed on her right side.

Speaking about the experience, he said it was the first time he had ever attempted anything like it, and it was “extremely hard but worth it”.

He said: “It went very well.

“It was raining but the rain really helped as it would have been much harder to do it if it was really hot.

“I’ve got blisters on my feet and I was so tired at the end of it, and I still haven’t completely recovered, but it was worth it.

“It was definitely an experience.”

Mr Clark signed up for the Thames Path Challenge last November after seeing it on the MS Society website and said he had been training hard to get ready for the walk.

Stepdaughter Sarah was diagnosed with MS in 2004 and also suffers from the rare progressive multifocal leukoencephalopathy (PML) condition which, according to Mr Clark, causes “irreparable” damage to the brain and can lead to disability or even death.

He said at one point things got so bad, he and wife Dawn thought they were going to lose her.

He added: “As I crossed the finish line I said I am never going to do this again, but you never know.

“My determination and my friends, family and work colleagues cheering me on kept me going. After a while it was like you just put one foot in front of the other. It becomes automatic.

“It was worth it, especially when you see the money that I’ve raised.

“The response I got from the MS Society who congratulated me on doing it has also made it worth it.

“I’m over the moon and so chuffed that I’ve done it.”