Sam Warburton’s Wales captaincy up for discussion with Rob Howley

• Flanker will discuss role with interim head coach Rob Howley next week• Alun Wyn Jones a likely successor; Warburton could concentrate on playingSam Warburton has not told Wales that he wants to give up the captaincy but he will meet Rob Howley at the beginning of next week to discuss the position as the interim head coach prepares for Tuesday’s Six Nations squad announcement.There has been speculation that Warburton, who has led Wales a record 49 times over six years, has agreed to give up the captaincy to concentrate on playing. He faces the threat of Justin Tipuric at openside flanker and…