21:00The Surgery with Katie and Dr RadhaRevision special with Aled & GemmaBBC Switch Duration: 1 hour Sun 10th Apr 2011, 21:00 on BBC Radio 1 N. IrelandGemma Cairney from 1Xtra joins Aled for a Revision Special with tips and advice designed to get you through your exams.GenresFactualHealth & WellbeingMusicPop & ChartBrandThe Surgery with Katie and Dr Radha Source: BBC Online