In message , Roland Perry
writes
And these keys are different for each train? Maybe so, but I'd always
thought they were one key that fitted all of them. Isn't it a bit
inconvenient to have a different key for each train if you are
reversing tube trains using the "stepping back" principle (that's where
one driver gets in the far cab and drives the train straight off, while
the original driver walks down the platform to be ready for the next one).
If I were you I'd give up whilst loosing, otherwise you'll fall.
You're just proving your ignorance to everyone else on here.
--
Clive.