By Jude Summerfield Manchester United have confirmed the appointment of former Manchester City chief Omar Berrada as their new CEO. It was previously confirmed Berrada, who has also worked for Barcelona, had decided to leave his post as chief football operations officer at City Football Group. Previous Man Utd CEO Richard Arnold left the club back in November as Sir Jim Ratcliffe’s INEOS group negotiated a 25% stake in the club. His successor has now been confirmed, though the Red Devils added current interim Patrick Stewart will remain in post until a starting date for Berrada is set. WILL TH…