16:00The Official Chart on Radio 1 with Jack Saunders17/04/2011BBC Radio 1 Duration: 3 hours Sun 17th Apr 2011, 16:00 on BBC Radio 1 N. IrelandReggie Yates counts down the latest official Top 40 to reveal the UK's new number 1 first, plus the latest news and gossip from those behind the chart headlines.GenresMusicPop & ChartExperimental & NewEntertainmentBrandThe Official Chart on Radio 1 with Jack Saunders Source: BBC Online