It contained no provision for whether or not he could be involved when the teams faced up, but it came as no surprise to player-boss Craig Brewster today when his plan to use Mulgrew on Saturday got the thumbs down from opposite number Gordon Strachan. In a phone call this morning, the Celtic manager made it clear he did not think the 19-year-old should have to face his usual team-mates.

“Charlie is disappointed because I think he wanted to play. But I’m not surprised he’s not getting to because it’s pretty much the norm that when players are out on loan they do not play against their club,” said Craig today.

While understanding the Celtic view, it is a decision that does not make Craig’s job this week any easier.

Experienced defender Paul Ritchie looks likely to miss out again through injury and that leaves United with a lack of left-sided options for their rearguard.

So much so, that this afternoon’s reserve game against Hearts at Station Park, Forfar, became a testing ground for youngsters who might be asked to fill in at left-back for the first team on Saturday.

“We are looking at William Easton in one half and Greg Burnett in the other and, if they show up well, they could come into the thoughts.

“We do at least have Barry Robson back from suspension and Jim McIntyre is left sided as well, but they both play further up the park,” added Craig.

Ritchie’s fitness problems mean the most obvious candidate, Alan Archibald, is likely to be needed in central defence again and his situation has been further complicated by a bout of flu. He missed training again today, although it is hoped he will be able to do some work tomorrow.