A four time world triathlon champion has taken on her toughest challenge yet after her team ran, climbed and cycled the UK's three highest peaks in a gruelling two day non-stop challenge.

Chrissie Wellington, from Feltwell, added the 4321 Challenge to her long list of accomplishments on Sunday having conquered the triathlon world in a glittering career.

In a twist on the popular Three Peaks Challenge, the 4321 saw the 37-year-old and three team-mates scale Snowdon, Scafell Pike and Ben Nevis - with the added test of cycling the 420 miles between the three.

The quartet took just under two days to complete the task, coming in at a time of 47 hours and 47 minutes, having started at 9am on Friday.

Ms Wellington said the challenge had pushed her to her limits.

'I took on the challenge because I really didn't know if it would be possible for me to finish it.

'I wanted to take myself out of my comfort zone, step into the unknown and push myself to the limit, raise money for charity and do all of that as part of a team. This amazing challenge was absolutely epic in every sense of the word.'