St Ledger has completed a three-month loan spell at Boro and is due to return to the Riverside in a £4.5million switch ... but there have been suggestions he has failed to settle on Teesside.
It has led to reports that the defender, who turns 25 next week, will try to extricate himself from the permanent deal that has been agreed with Boro.
Alan Irvine (Preston boss): "Sean will sign on January 1 for Middlesbrough on a permanent basis
"It was always going to be a permanent deal.
"I wish I could say Sean was coming back, but he's not."