Cole Palmer leaving Manchester City for Chelsea has developed into one of the biggest talking points in football – let alone just the Premier League. Many have questioned why Pep Guardiola allowed the England international to leave the Etihad Stadium for Stamford Bridge back in September. Sam Allardyce said Manchester City “slipped up” when sanctioning the £42.5m deal, while Darren Bent thinks Chelsea robbed the treble winners by nabbing a “bargain” off them. So, why did Manchester City sell Cole Palmer? Sources close to the situation have now shared their beliefs… Why Cole Palmer left Manches…