LUL in South East London
I had a lot of fun with the 7 points concept and came up with this concept of two tube lines serving a fictional version of south East London. Tube gauge stock (from a Bakerloo Line extension?) will terminate at Bluewich whilst sub service stock (possibly from the East London Line although of course that is now part of the Overground) runs through to Wither Green. Limited stabling is available at both ends of the line. Stock would be entirely passenger although a PW train could occasionally be wheeled out. In terms of operation, you would probably need to stick to a timetable and switch between the two lines.