13:00Snooker: World Championship2018Episode 9: Day 4, Afternoon SessionBBC Two Duration: 5 hours Tue 24th Apr 2018, 13:00 on BBC Two Northern IrelandHazel Irvine introduces coverage from this morning's matches, before live action resumes at 2.30pm with two-time champion Mark Williams taking centre stage.GenresSportSnookerBrandSnooker: World ChampionshipSeriesSnooker: World Championship: 2018 Source: BBC Online