Dara O Briain to tackle Zambezi River for Comic Relief

Presenter Dara O Briain and a team of other celebrities will take on the river Zambezi in the latest Comic Relief challenge.

Long-jumper Phillips Idowu , Greg James, Chelsee Healey, Jack Dee and Melanie C will brave white water rapids, crocodiles and hippopotamuses on Africa's fourth longest river.

BBC Radio 5 live Breakfast asked Mr O Briain what he was expecting about it.