16:00The Official Chart on Radio 1 with Jack SaundersWith Justin Beiber & Rita OraBBC Radio 1 Duration: 3 hours Sun 13th May 2012, 16:00 on BBC Radio 1 ScotlandListen or watch as Reggie counts down the Top 10 to reveal the UK's new Official No 1. Rita Ora is live in the studio with Reggie and Justin Bieber is the Chart Geek!GenresMusicPop & ChartEntertainmentBrandThe Official Chart on Radio 1 with Jack Saunders Source: BBC Online