The People says the then Preston defender was all set to move north of the border on July 1 after agreeing personal terms on a pre-contract, with his Deepdale deal ending in the summer.
But Celtic inserted a clause requiring the 25-year-old to be injury-free and fit to play when reporting for duty.
“He's earned his move and when he gets his opportunity he has to show everybody what he's about."
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!