Leinster had a great start to their Heineken Cup campaign last week away to Ospreys but tomorrow they pitch themselves against the Top 14 Champions Castres. 

Castres haven't always applied to themselves to this competition the way Toulose, Clermont and Toulon do but at their best they are incredibly hard to beat as they showed last season in France and while they have struggled domestically for consistency this season they have recorded wins over Toulon, Stade Francais and Racing Metro and last weekend they beat Northampton at home.

Ahead of tomorrow game we caught up with Leinster likeable new coach Matt O'Connor and talked to him about missing Brian O'Driscoll, the new scrum laws and Gopperth V Madigan for the out half spot. 

Incidentally Leinster v Castres is live on Newstalk.