Building on a talk by eta from EMF 2022, this is a deeper dive into how to make use of London Underground's real-time data and hard-to-access timetables to predict a train's future actions. I will be going into depth on what is and isn't useful about TfL's APIs, the major differences between the operations of LU and National Rail operators, why it's so difficult to obtain LU timetables in a useful format, and why it's even more difficult to apply real-time data to them.