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Scott Mills sits in for Reggie Yates to count down the latest official Top 40.
BBC Radio 1, BBC Radio 1 N. Ireland, BBC Radio 1 Scotland, BBC Radio 1 Wales
Reggie Yates is joined by guests Calvin Harris, Tinchy Stryder and Dappy.
Reggie Yates counts down the latest official Top 40 to reveal the UK's new number 1 first.
Scott sits in for Reggie to count down the official Top 40 and reveal the UK's new No 1.