On Fri, 07 Nov 2014 11:19:53 +0000, Basil Jet
wrote:

The plan in the TL2000 documents was to do all changeovers at City
instead of Farringdon, because the dual-electrified sidings at City can
be used to get trains with pantographs stuck up or down out of the way
of the other trains. Farringdon of course used to have the
dual-electrified Moorgate Branch as a place to hide trains with stuck
pantographs, but lost that when the platforms were extended over the
junction (which I presume has happened by now), so I'd be very surprised
if any trains were still changing power at Farringdon.

It certainly has happened! Odd to stand on a part of platform that
used to be an open-air junction.

And as mentioned elsewhere on the thread, the changeover can/does
happen at Farringdon, and that's OK, because the wires extend to City,
so there is still access to the sidings.

Richard.