"No, it definitely wasn't me streaking in the fountain," insisted the Glasgow man, as he tried to distance himself from the frolicking in Trafalgar Square that some of his more inebriated countrymen indulged in last week.
Far from that madding crowd, Jamieson has returned to peaceful Perthshire for a Johnnie Walker Championship that features 25 competing Scots. Fresh from a top-30 finish in the US PGA Championship a fortnight ago, the 29-year-old is in upbeat mood as he looks to build on his Oak Hill performance. In this game, there's always room for improvement.
"It's always nice to come to a tournament after a week off, because you feel more prepared," said Jamieson, who claimed his maiden European Tour victory in South Africa at the start of the year. "I got a bit of confidence from the PGA, knowing that I can play in that environment, against the best players in the world. I played well at times but it was noticeable to me that there are areas where I can improve. I find that encouraging, that I can finish in the top 30 of a major and still feel like I wasn't really firing on all cylinders."
With the Ryder Cup at Gleneagles just over a year away, European qualification for the 2014 tussle begins at next week's Wales Open. "I hadn't really thought about playing here this week and imagining returning next year, maybe I will now," he added.
There is also the Seve Trophy looming on the horizon, an event that Jamieson has played in before and one that can be a showcase for potential Ryder Cup players.
"Obviously it would be a dream to play in any Ryder Cup, let alone one in your own country," said Jamieson, who sits in 103rd place on the world rankings and is determined to clamber as high as he can before the year is out to bolster his ambitions.
"A lot depends on how I play for the remainder of this year, that will affect my chance. If you are not in the top 50 come the turn of the year, you're not getting to play in the big events - and you need those to get the ranking points. I want to maybe squeeze another win in and aim for the Seve Trophy, too. The higher you climb, the more doors open for you."