Clive D. W. Feather wrote:
In article , asdf
writes
It may be worth pointing out that there are no tripcocks on the central line
(or the vic line).
There is one on the Victoria Line, at signal VK11.
That would be a trainstop, surely?

True. In which case there are probably several tripcocks at
Northumberland Park.

There isn't one at VK11. There is however a fixed trainstop on the
Highbury side of 10A points.
Similarly there are fixed trainstop ramps between 3A points and
Finsbury Pk NB Platform, and also leaving Northumberland Park depot.