"Jack Taylor" wrote in message
...

I work down there - and the Circle line service (in particular the Outer
Rail service) has been rubbish all week. One evening, at about 18:00, they
were advising that the next clockwise Circle would not be for in excess of
fifteen minutes. I suspect that they've had crewing or stock problems this
week.

As the Circle line frequency is 8.5 minutes, that would be one cancellation.
On most other lines, passengers wouldn't notice one cancellation, but on the
Circle and Hammersmith and City you do.