John will skipper the Warriors in tonight's Magners League meeting with Ulster at Ravenhill.
“There was a buzz in the Scotland camp, but there is also a buzz here because we are sitting third in the league,” said John in the Times. “It is different, but it is important that the guys coming back carry that enthusiasm for the way we have been playing with Scotland back into the Glasgow team.
“This is your bread-and-butter, week in, week out. It is good to get back and catch up with the guys. Ulster are level with us on points at the moment so if we win we start moving away from them. We want to get the momentum going into the Heineken Cup and the derbies over Christmas and the new year.”