In article ,
Recliner wrote:
Epping and Amersham were both affected, and are about 30 miles apart
as the crow flies, and 44 miles apart by track kilometerage.

I mentioned Uxbridge, not Epping.

.... in the context of "power supply problems" - which may or may not have
been caused by iced-up conductor rails. Which were reported all over the
network:

https://twitter.com/centralline/stat...41391773061120
https://twitter.com/metline/status/939783801387061248
https://twitter.com/northernline/sta...67343521550336
https://twitter.com/jubileeline/stat...91679812505601

I can't think of an explaination for the widespread disruption that
/isn't/ ice-on-the-conductor rails - something like the national
grid being unable to supply sufficent current to LUL due to their
issues would have affected the victoria, circle and bakerloo too:
and they didn't report power supply problems.

What's a plausible alternative?

--
Mike Bristow