Dirty tricks.

Sam Warburton has revealed the ‘dirty tricks’ England played on Wales ahead of their huge Rugby World Cup pool stage clash in Twickenham back in 2015.

England ended up losing the game 28-25 in an absolute belter than ultimately resulted in Stuart Lancaster’s side embarrassingly crashing out at the pool stage, despite being tournament hosts.

In a documentary titled Sam Warburton: Full Contact, screened on BBC Wales on Friday evening, Warburton revealed how England played tricks on them in the build-up – turning the heating up to unbearable levels before switching the lights on and off in their changing room.

“We were in the changing room and it was unusually hot.” Warburton said

“We said could someone turn down the heat for goodness sake because somebody is having a laugh here turning it up.

“Then the lights went out and it was pitch black in there momentarily. They were coming on again and going off.

“We were all thinking ‘they are trying to get under our skin here’ and it kind of added fuel to the fire.”

You can watch the full Sam Warburton documentary on BBC iPlayer here.