I've just been watching a rather interesting video, which may appeal to other fans of London and etymology.
There's lots of shots of London landmarks, and some fascinating information on the words and phrases that they have borne. Lots I had never considered the origins of. I found it interesting that there's quite a few that are in use, or have been used, in American English too; double crossed, zoo, subway, sandwich to name a few.
A 21 minute watch on Youtube for anyone that might be interested. What's your favourite or most surprising?