Former Celtic stopper Rab Douglas has issued a stout defence of the club’s current No1 Joe Hart, who he has backed to stay at Parkhead beyond the end of his current contract. At the moment, Hart is scheduled to leave Celtic in the summer but of course, that could change if Brendan Rodgers believes he is worthy of an extension. Hart is now 37 and the consensus among most Celtic fans is that it would be reasonable to naturally part ways with the former Manchester City goalkeeper in June and seek a new No1. Rodgers hinted at doing just that at the beginning of January, suggesting that Hart may no…