Simon Yarwood, 23, who went to Carre's Grammar School, joined researchers Kate McAllister, Eddy Flynn, Paul Gilbert, Annie McClure, Jo Barnes and Catriona McWhirter in the challenge.

The scientists are part of the University of Manchester Epidemiology Unit who are helping to identify the genes behind rheumatoid arthritis.

They did the challenge for their funding body the Arthritis Research Campaign.

Simon, who now lives in Manchester and is a trainee accountant, went on the challenge to support his partner Annie McClure in the fundraising effort.

He said: "I personally raised £400 for the cause and as a group £1,500 has been raised so far. The original target was a total of £300.

"Even though I am not involved in the research, I still wanted to take part and do my bit. The Three Peaks was probably the hardest and physical thing I have done. I was aching for days after."

The group managed to complete the Yorkshire Three Peaks in 10 hours 59 minutes, way ahead of the 12 hour time limit set on the challenge.

The walk takes in the summits of Pen-y-ghent, Whernside and Ingleborough in one circular 24.5 mile route.

It also includes over 5,000 feet of climbing and has a variety of terrains.

The scientists are part of a team who have identified a genetic variant that is associated with rheumatoid arthritis.

The team is working to identify all the genes behind the disease as part of the largest ever study of the genetics behind common diseases.