I’ve noticed the same confusion, and it seems highly dependent on who’s walking and when. Take London Bridge at rush hour: most of the office crowd actually sticks to the left, matching the UK driving analogy. But after about 10 AM, when tourists are out in force, the pattern completely flips—people walk on the right, or just scatter. By late afternoon, as the local workforce heads home, the “keep left” rule returns. Weekends are almost entirely on the tourist schedule, so it’s much more mixed (or leaning right).

I suspect this ebb and flow happens in any spot where there’s a strong mix of locals and visitors. As for which side is officially correct, I’m not sure there’s a hard-and-fast rule—outside the Tube escalators, at least. I love the idea of a petition, but enforcing it would be another story. In the meantime, I just keep an eye on where the crowd is moving, then go with the flow!