16:00The Official Chart on Radio 1 with Jack SaundersDev sits in for Greg JamesBBC Radio 1 Duration: 1 hour, 45 minutes Fri 24th Mar 2017, 16:00 on BBC Radio 1 EnglandDev sits in for Greg James and counts down to the UK's official new No 1.GenresMusicPop & ChartBrandThe Official Chart on Radio 1 with Jack Saunders Source: BBC Online