Rugby Tonight: Top ref Wayne Barnes explains Law changes

Leading referee Wayne Barnes joins Rugby Tonight's Ben Kay and Ugo Monye and Saracens' Maro Itoje to look at the Law changes that players and fans must get to grips with ahead of the new Premiership season. Subscribe: http://bit.ly/17YTeL5 Twitter: http://twitter.com/btsport Facebook: http://www.facebook.com/btsport Instagram:http://instagram.com/btsport Website: http://sport.bt.com