A brother and sister are doing a special charity challenge this week with the aim of raising £5000 for a WaterAid project in Nepal.

Adam Kyte, who lives in St Germans, and his sister, Meg Gregory, are aiming to complete the famous Three Peaks Challenge, climbing Ben Nevis in Scotland, Scafell Pike in England and Snowdon in Wales.

But as if the three ascents weren’t enough of an endeavour, they will be doing the climbs – which total more than 3,000 metres – three-legged.

And rather than following the example of most Three Peaks challengers who drive between the mountains, they will be cycling more than 500 miles on a tandem.

Adam, who works at the University of Plymouth, said: ’People have told us this is impossible, superhuman and/or foolhardy. But we both believe that it is a waste of time doing challenges that we are sure we can do, so we are taking on something to push us to our limits.’

The pair started their seven-day challenge today in Scotland and will spend the next six days walking and cycling through Scotland, England and North Wales. They hope to complete their ascent of Snowdon on June 15.