Manchester United defender Craig Cathcart is staying on-loan at Plymouth Argyle to the end of the season.

Cathcart linked up with the Championship club in August and has become a key figure in Paul Sturrock's side.

Sturrock had been keen to hang on to Cathcart and the club have confirmed United have agreed to an extension.

The paperwork is set to be completed after Christmas and Cathcart is in line to start Boxing Day's game against Southampton.