Sam Allardyce admits being powerless on Ross Barkley’s Everton future

• New manager yet to discuss contract situation with Barkley
• Calvert-Lewin, Holgate and Kenny sign new long-term dealsSam Allardyce has said he will be powerless to prevent Ross Barkley leaving Everton next month should the club’s board decide to cash in on the midfielder.Barkley, yet to feature this season because of a serious hamstring injury, is out of contract at the end of the campaign having rejected a new deal with his boyhood club. He turned down a move to Chelsea on de