D7666 wrote:

The real overground network of the only real railway in London is here
:

http://virtualportmeirion.com/network/largemap.htm

That's a fantastic map - clearly the 'new' ON map was heavily inspired
by that! Much more useful to the passenger than the current idea of
distinguishing services by TOC. Actually, I think this is a hang over
from the original NSE/London Connections map, which was the first to
divide the map by operating areas (Kent Link, South London Lines etc).
But even that used to distinguish Victoria/Blackfriars and Cannon
St/Charing Cross services from each other with different shades of
green.