In message , Mike Bristow
writes

There is a whole procedure in place for such an eventuality.

Basically this involves using the driver of the following train (either
in or out of service, depending upon where it happens) and repeating
this until an extra driver is made available.

Oh! That makes a whole lot of sense. How often does it happen,
roughtly?

Never that I know of in the past two years, although we did have an
exercise doing it last year.
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
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