Million Pound Bike Ride: A Sport Relief Challenge

David Walliams recruits Miranda Hart, Davina McCall, Jimmy Carr, Russell Howard, Patrick Kielty and Fearne Cotton to attempt a non-stop cycle relay between John O'Groats and Lands End, for Sport Relief. The gruelling four-day challenge involves cycling almost 1,000 miles through day and night, during the coldest winter for thirty years.