Uses the south London section of the Large Scale All Stations TOC map and condenses the outer lines. Doesn't really work in isolation from other operators. But it's quite pretty with a nice curvy middle and fairly symetrical arms.
Like all FWT maps, exceedingly precise. Resorts to angled captions though and coast unrecognisable to the real thing. Usual mistake of not bifurcating properly at East Croydon, and the usual south London mess. Very brave including some buses.