In message
,
John B writes

Can anyone explain this please? 40 minutes of engineering work per day?

I know this one.

It's the amount or time required to put protection in place at Uxbridge
for the works on the station roof. Apparently once that is done, normal
services can then resume until end of traffic.

This might be a stupid question - but if the protection is such that
it allows normal services to happen while it's in place, why don't
they just leave it up 24/7?

That one I don't know. I'm guessing here that it might involve getting
people to and from the work site - you would hardly leave them there 24
hours would you?
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
(please use the reply to address for email)