This app will stop working on 3rd April 2017. But you can still listen to BBC iPlayer Radio via your browser by visiting bbc.co.uk/radio
Dev sits in for Reggie to count down the new official Top 40.
BBC Radio 1, BBC Radio 1 N. Ireland, BBC Radio 1 Scotland, BBC Radio 1 Wales
Scott Mills sits in for Reggie with the countdown to the UK's official Christmas No 1.
Scott Mills sits in for Reggie Yates and counts down the official Top 40.
Reggie counts down the official Top 40 to reveal the UK's new No 1 first.