I'm confused about the London Overground line.
Why include some routes & not others?
Looking at my old home town of Walthamstow, I noticed that the overground line at Walthamstow Queens Road was included but not the line from Liverpool Street to Chingford which connects with Walthamstow Central Underground.
As this is a major commuter route & within the travelcard Zones, why not include it?