06:30Nick GrimshawDermot O'Leary drops in to talk Comic Relief.BBC Radio 1 Duration: 3 hours, 30 minutes Tue 10th Mar 2015, 06:30 on BBC Radio 1 EnglandDermot O'Leary drops in to talk Comic Relief and dancing!GenresMusicPop & ChartEntertainmentBrandNick Grimshaw Source: BBC Online