In message , at 11:53:23 on Wed, 26 Sep
2018, Graeme Wall remarked:
Apparently they haven't got a train to test the signalling with! Hence
the delay:
https://www.bbc.co.uk/news/uk-england-london-45496269

That's the kind of issue which has no excuse, because the need for the
testing has been apparent since the start of the project.

There are all kinds of hiccups which might happen to a project like this
(many of which one might have sympathy with), but not getting delivery
of a testing train is an elephant in the room.
--
Roland Perry