In message , RPM
writes
The tripcock arm is on the 6 foot side so accessibility is restricted
to the sucidally insane unless a block can be arranged with the
signaller.

To reset the tripcock manually requires more than a little brute
strength. If possible a brick, large chunk of ballast or piece of wood
is needed to perform this function.

On 73 Tube Stock, you just press a button in the cab - how difficult is
that then?
--
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)