Kieran Trippier has joined Burnley on a permanent deal for an undisclosed fee.
The England under 21 right back, who is currently suspended after being sent off at Leeds, has been on loan at Turf Moor since the start of the season.
He never made a senior start for the Blues but was an integral part of the FA Youth Cup winning side and had a successful spell away at Barnsley.
Harry Bunn, meanwhile, has joined another Lancashire club, Preston North End, on loan. He had been at Rochdale.
Burnley could tie up a deal for another Blues loan star, Ben Mee in the coming days.