Here is a classic case of the amount of leeway built into today's timetables.
This morning's 11.53 Chiltern Railways service from London Marylebone to Bicester North left on time.
It was delayed at Gerrards Cross due to a minor fault and left there 9 minutes late.
It is due to arrive any moment now at Bicester North, on-time.
Edit: For the record, the train actually arrived at Bicester North at 13.10. I think I must be a little light on blogging material at present.