…to end my short diversion into the world of public transport, one more idea.
People who use public transport rarely usually choose a train before a bus. Train maps and services are simpler to understand. They get into much deeper trouble when a line is disrupted. What are the alternative routes?
How about setting up a bus route to follow each tube line and inner suburban train line. They would have stops at major stations, and if the gap between stations is large, they’d have a stop mid-way. These routes have already been defined by the train companies: they have planned them for the case where they need to provide a replacement bus service when the line needs to be closed.
This means you can have a 24 hour service on all train lines – using buses. It is a lot easier to translate your understanding from a tube map to a set of buses that follow the same routes.
…now back to the movies…