Barker stays at U's for rest of the season
Meanwhile Jeff Whitley's loan spell at Stoke has ended. The midfielder is expected to move to Millwall without needing to unpack his kit in Cardiff in between.
Joe Jacobsen, as previously reported, is staying at Accrington for another month but Curtis McDonald has returned to City from Accrington and Jamal Easter is bak in the fold after his loan spell at Bristol Rovers. Both players were on standby for City's trip to Luton as several senior players struggled to overcome knocks.