I was looking at my fb memories just now, and was reminded that we were in London 5 years ago. In the evening, we walked through Paternoster Square and had paused near the monument thing and saw a couple get engaged as the cathedral bells rang - we were too far away to hear, but he went down on one knee and everything. I often think of that couple - that's the only proposal I've ever seen and it was just so perfect!
I wonder if they're happily married now, with kids?