16:00Radio 1 Breakfast with Greg JamesRachel Riley Pops InBBC Radio 1 Duration: 1 hour, 45 minutes Tue 7th Apr 2015, 16:00 on BBC Radio 1 EnglandRachel Riley pops in and sings some maths, plus we find out what happened when Greg dropped the BBC News Theme Tune at his DJ set last weekend!GenresMusicPop & ChartBrandRadio 1 Breakfast with Greg James Source: BBC Online