19:40Rugby UnionMontpellier v Northampton SaintsBBC Radio 5 Sports Extra Duration: 3 hours Fri 20th Jan 2017, 19:40 on BBC Radio 5 Sports Extra5 live sports extra joins BBC Northampton for live commentary from the European Champions Cup tie between Montpellier and Northampton Saints.GenresSportRugby UnionSeriesRugby Union Source: BBC Online