Greg James sits down with Lorraine to reveal his most ambitious Sport Relief challenge yet: Pedal to the Peaks. Over five grueling days, he'll cycle 500 miles between England, Wales and Scotland while climbing three of the UK's highest mountains—Snowdon, Scafell Pike and Ben Nevis—all while broadcasting live from the Radio 1 Breakfast Show. There's just one problem: a polar vortex is forecast to hit during the challenge. Greg also discusses his bestselling children's book Kid Normal with co-author Chris Smith.