In message , at 11:50:20 on Thu, 5 Jul 2018,
Anna Noyd-Dryver remarked:
Roland Perry wrote:
In message , at 09:58:26 on Thu, 5 Jul 2018,
Graeme Wall remarked:

Just when you thought it couldn't get any worse…

https://www.bbc.co.uk/news/uk-england-london-44721415

I smell a rat.

It's extremely unlikely that Network Rail has experienced the
simultaneous failure of three separate incoming grid feeds, nor would it
take all day to get just one of them re-instated.

This sounds like the *Network Rail* equipment which merges the three
feeds into the supply to the signalling centre has gone up in smoke.

Any other electricity supply issues reported overnight in Stretham?


Presumably you’re referring to the tweet referenced in that article
“Passengers are advised not to travel from the South into London this
morning due to total loss of signalling power that Network Rail has
experienced on 3 separate supplies in Streatham area.”? I see no
suggestion that it’s external rather than railway-internal power supplies
which have failed.

It's one signalling centre which is without power, thus the "three
supplies" must be those for that centre.

Here's another report from Network Rail (via Simon Calder):

"A generator has been sourced to isolate the power feed and is
expected to arrive at the signalling centre later this morning.
Once the generator arrives, the situation will be re-assessed."

Note, not three generators, one for each of hypothetically three
separate sites.
--
Roland Perry