16:00The Official Chart on Radio 1 with Jack SaundersMistaJam sits in for GregBBC Radio 1 Duration: 1 hour, 45 minutes Fri 8th Dec 2017, 16:00 on BBC Radio 1 EnglandMistaJam is in for Greg and counting down to the UK's Official No.1.GenresMusicPop & ChartBrandThe Official Chart on Radio 1 with Jack Saunders Source: BBC Online