Six Nations 2015: 'Honest mistake' made over North - Warburton

Wales captain Sam Warburton says their backroom staff "made an honest mistake" when wing George North's second head knock against England was not spotted.

North has been omitted from the team to face Scotland on Sunday after Wales took into consideration North's concussion history.

He has not been diagnosed as concussed on this occasion and has a three-week rest period before Wales face France in Paris on Saturday, 28 February.

Liam Williams has taken over on the left wing for Wales - their only starting change - and flanker Warburton told Wales Today's Ashleigh Crowter they have a chance to redeem themselves after the defeat by England.