We had previously done a monopoly walk in 2005. This one obviously checked in at most of the same squares but we had a totally different route, again of 10 miles walking plus 5 buses. Our weekend coincided with the "Play me, I'm yours" art festival of street pianos, which added further to the fun of seeking out streets, stations, jails, etc.
10 of us thoroughly enjoyed this view of London which, almost without exception avoided London's crowds.