16:00The Official Chart on Radio 1 with Jack SaundersDev's in for GregBBC Radio 1 Duration: 1 hour, 45 minutes Fri 28th Aug 2015, 16:00 on BBC Radio 1 EnglandDev counts down to the UK's new official No 1 - find out if Jess Glynne can make it two weeks at the top.GenresMusicPop & ChartBrandThe Official Chart on Radio 1 with Jack Saunders Source: BBC Online