The second Rabo Direct Pro 12 weekend gets underway tonight with three Irish provinces in action but it's the new scrum calls and the return of hooking is the main debating point.

Cardiff Blues host Connacht and Ulster meet Glasgow at five past seven at seven thirty Zebre welcome Munster.

Leinster host Ospreys tomorrow at the RDS.

Former Leinster and Ireland Prop Reggie Corrigan has been talking to us about the new scrum calls and the return of hooker.