On Tue, 9 Nov 2004, Clive D. W. Feather wrote:

IIRC, there's a class of mainline train that has a *fake* push button on
it[*].

[*] There's a good reason for this - the door in question is operated by
breaking a light beam. If your body doesn't break the beam, reaching out
to the button will.

Surely the button could still be a real button - then, if the beam's duff
(which it most assuredly will be one day), you can still open the door.

tom

--
I'm angry, but not Milk and Cheese angry. -- Mike Froggatt