13:00Radio 1 Breakfast with Greg JamesGrimmy sits in for GregBBC Radio 1 Duration: 3 hours Fri 23rd Mar 2012, 13:00 on BBC Radio 1 N. IrelandNick Grimshaw sits in for Greg James with some afternoon lols.GenresMusicPop & ChartExperimental & NewEntertainmentBrandRadio 1 Breakfast with Greg James Source: BBC Online