17:20The FA CupFA Cup 2021/22FA Cup Fourth Round: Cambridge United v Luton TownBBC Sport Duration: 2 hours, 10 minutes Sat 5th Feb 2022, 17:20 on Red Button OneCoverage of Cambridge United v Luton Town in the fourth round of the FA Cup.GenresSportSportFootballBrandThe FA CupSeriesThe FA Cup: FA Cup 2021/22 Source: BBC Online