Irish provinces in Champions Cup action this weekend

Leinster begin a crucial phase of their season tonight, when they face Northampton in the Champions Cup. 

Leo Cullen's side sit top of Pool 4 ahead of their double-header with the Premiership side. 

Leinster are five points better off than they were at the same point last season, and flanker Sean O'Brien believes the side have grown since that disastrous campaign. 

Kick off at Franklin's Gardens is at 7.45. 

Munster and Ulster are also expected to name their sides today, ahead of tomorrow's meetings with Leicester and Clermont respectively.