“Unless they beg me to stay another year, I think I’m done,” he told BBC Sport.
“I have had a great run and enjoyed every single moment but it is time to step aside. I am not going to flog a dead horse, although some might say I’ve been two years dead anyway!
“I love the sport, I love being in it and I love the guys I work with. But I just don’t have the gas anymore. I can’t get through those holes I see. I can still truck it up a distance, but there is definitely a blunting of the axe.
“It is disappointing it is coming to the end but I am 36 and I have done pretty well considering, when you look at the guys in the Scotland squad. Even if I was just arriving at my peak I don’t think I would get in the current side.”