16:00The Official Chart on Radio 1 with Jack Saunders11/12/2011BBC Radio 1 Duration: 3 hours Sun 11th Dec 2011, 16:00 on BBC Radio 1 N. IrelandReggie counts down the latest official Top 40 to reveal the UK's new Number 1 first and takes a look at some of the Christmas Number 1 contenders.GenresMusicPop & ChartExperimental & NewEntertainmentBrandThe Official Chart on Radio 1 with Jack Saunders Source: BBC Online