A panicked dash to the platform is one thing, but Google's Maps train timetables are only as good as they are accurate. While you've been able to check up on the next train's expected arrival for some time, any information gleaned was always set against the inevitability of a delay somewhere down the line.
Finally, Google's Maps app now accounts for train delays when recommending a public transport route to its users. Pulling in real-time National Rail data, the application will now offer updated route information if a delay comes in, should there be a signal failure or, you know, some leaves fall on the line or something. [Play Store, App Store]