everyday being delays allowing passengers on and off the train in peak times, when people take precious seconds squeezing into impossibly small gaps, and fellow passengers do not move through the carriages to allow people on.

If a train loses, say, 30 seconds doing this at every stop, by the end of a journey calling at ten stations its five minutes late.

So, therefore, is the next service(or indeed services) which that train and driver are due to run.