At one stage in today's excerpt, he spent 22 seconds looking to his right before managing to drag his head away to look at the other half of the audience on the other side of him.
It was also noticeable when he spoke at the Open University in May (HERE).
Nor is he alone, as Alistair Darling and Gordon Brown suffer from the same problem, as too did Margaret Thatcher (HERE).
What really flabbergasts me is that the advisors of politicians in such front-line positions don't seem to notice the problem or, if they do, they don't seem to think matters enough to do something about helping their bosses to solve it.
After all, reminding and coaching someone to remember to look from side to side more frequently is hardly the most difficult technique to get across, however busy and important their bosses might be.
What's more, there's plenty of time between now and his big speech on Thursday to fix it. And, needless to say, I shall be watching with interest.