In message , at 19:44:51 on
Wed, 24 Sep 2014, Paul Corfield remarked:
Introducing the "Night Tube" does raise the issue of what happens if
there is planned engineering work. Do we get "night tube replacement
bus services"?

Or they could do the work on Sun-Thu nights only.

For serious stuff they could close it all day Sunday (from 4am anyway),
as they do already.
--
Roland Perry