Joe Hart on a long-term deal but has warned his new team-mates to prepare for a verbal rocket. The pair were colleagues for a season at Birmingham City in 2009/10 and it was the former England international's head-turning displays at St Andrew's that led him back to Manchester City.Hart believes the switch to Parkhead has come at the right time for him as the 34-year-old looks to rebuild himself five years on from being axed by Pep Guardiola.
And Ferguson is convinced the signing of the shotstopper will be a major boost to Ange Postecoglou after a rocky start to the season.
Speaking to Go Radio, he said: "He trains to play, I know he hasn't played the last few years at Burnley then Tottenham.Get all the latest Celtic news sent straight to.
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