16:00The Official Chart on Radio 1 with Jack SaundersScott Mills sits in for ReggieBBC Radio 1 Duration: 3 hours Sun 31st Jul 2011, 16:00 on BBC Radio 1 N. IrelandScott Mills sits in for Reggie Yates to count down the latest official Top 40 and reveal the UK's new No 1. Maverick Sabre drops in, plus Scott catches up with Six-D and JLS.GenresMusicPop & ChartEntertainmentBrandThe Official Chart on Radio 1 with Jack Saunders Source: BBC Online