Wales squad: Gatland signals end of Warrenball with major shuffle

• Jamie Roberts and Scott Williams left out of autumn Tests squad• Gatland looks to replicate Lions’ successful midfield strategyWarren Gatland has left Jamie Roberts and Scott Williams out of his Wales squad as he conducts significant surgery on his midfield before the autumn internationals.The Wales head coach has selected four fly-halves among 16 backs, hinting he is considering a switch in strategy to the ball-playing first-and-second five combination that worked so successfully on the Lions tour with Johnny Sexton and Owen Farrell. Related: Master motivator Alan Jones has point to prove w…