Sport Relief: Radio 1's Nick Grimshaw completes 12 hour cycle challenge
17 March 2014 Last updated at 22:03 GMT
Radio 1 DJ Nick Grimshaw has completed a 12 hour bike ride for Sport Relief.
The presenter's challenge took place in a large, transparent box outside BBC Broadcasting House, and he was joined by other celebrities throughout the day, cycling more than 1,000 miles and raising more than £115,000 for charity.
Speaking shortly after completing the ride, he told BBC News that his experience of seeing how the money would be spent had motivated him.