In message , Ian
Johnston writes
I've been called out at 2am to inspect leaking gutters at the workplace
I was responsible for; if that helps.

And you repaired them there and then, did you, leaving no part of the
job until the morning?

We did what was necessary to keep the (24x7) workplace running normally
until further notice - the other option being to abandon ship. And then
fixed it properly later. In the case of the trains, what is missing is
the "restoring normal operation" aspect.
--
Roland Perry