Wayne Barnes and Lions auditions: Key talking points ahead of the Wales game

"We play off more scrums than anyone else in the championship, and it's incredibly infuriating when teams that don't tend to play off scrums get rewarded for the way they approach the scrum."

Wales tackle Ireland at the Principality Stadium in Cardiff on Friday as this season's RBS 6 Nations Championship resumes.

Here, we look at some key talking points ahead of the countries' 125th meeting.