16:00The Official Chart on Radio 1 with Jack SaundersScott Mills sits in for ReggieBBC Radio 1 Duration: 3 hours Sun 22nd Jan 2012, 16:00 on BBC Radio 1 N. IrelandScott Mills sits in for Reggie Yates to count down the latest official UK Top 40.GenresMusicPop & ChartExperimental & NewEntertainmentBrandThe Official Chart on Radio 1 with Jack Saunders Source: BBC Online