Old Kent Road to Mayfair
This map has a few things wrong with it (also pointed out on the reddit thread where I found it. The orange properties (which make the least sense of any of the groupings) are definitely in the wrong places. I always thought that ‘Marlborough Street’ had to be ‘Great Marlborough Street’.
I went looking for a better map and found this Google Maps plot that looks a bit better.
And now I’ve discovered someone has written a whole book on this kind of tangent: Do Not Pass Go by Tim Moore..