Americans aren't always wrong

If you were to show the same map over time it'd show the Romans, the ancient Greeks, the Egyptians and pretty much everyone up till about three hundred years ago all stuck to left hand side because most people are right handed and it's easier to shake hands/hack with a sword/anachronistically high five if you pass on the left. So if the "British person voice" was a good impression of The Doctor, he was kind of right in a wibbly wobbly timey wimey kind of way.

*american person voice* "It's called soccer, not football!" Really? Cos every other country.. ever, seems to disagree.

Well, think about it, we actually drive on the RIGHT side of the road.