score:11
I'm a 70-year-old woman. I visit London about once a year, because it is one of my favorite cities, I used to live there, and my relatives all live in England.
I do the things I expect most people do in tourist areas, such as not flashing a lot of cash, and not making life easy for pickpockets.
Otherwise, I pay far more attention to avoiding traffic accidents. The combination of unfamiliar side of the road, complicated one-ways, dense traffic, and pedestrians who are both familiar with the intersection and impatient, makes for a dangerous mix.