In message , asdf
writes

As we had a number of signal failures after the weekend's enforced
drought reduction scheme, I finally ended up 30 mins late at Arnos Grove
- having now driven constantly for 4 hours 45 mins without a break.

Is there a certain time limit after which you *have* to stop driving
(even if it means disruption)?

After 4 hours 15 mins driving you have to take the train to the nearest
sidings or depot. It can't be just left on the main line. As it
happened, I only realised as I was leaving Wood Green, so the nearest
sidings or depot would have been Arnos Grove; and I was due to get off
there anyway.
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
(please use the reply to address for email)