Winger Mikey Johnston has left Celtic permanently after years on the fringes of the first-team squad at the Bhoys. Johnston made 93 appearances in total for his boyhood side but never really cemented a regular starting spot in Glasgow. The club pursued a couple of development loans over the years to help the attacker build his career after a string of injury issues but it had become apparent over the last 12 months he didn’t have a future at Celtic. He’s now ‘buzzing’ to be making the move back to West Bromwich Albion in the English Championship, where he made a strong impact on loan in the se…