Wales frustrated at lack of England roof decision and warn them over discipline

• Shaun Edwards on roof: ‘It’s an unusual situation where opposition decide’• Defence coach warns that keeping 15 players on pitch is vitalWales are preparing to play under a closed roof against England at the Principality Stadium on Saturday after the visitors’ head coach Eddie Jones said he was not bothered whether it was open or shut, but the home side are frustrated the decision is out of their hands.If Wales want the roof shut, the visiting team has to agree and if England have not said yes by Thursday afternoon, it will remain open on Saturday when the forecast for the Welsh capital is f…