I'm curious as to why the LU ticket windows and ticket machines at
Victoria (in their temporary home on the forecourt of the station)
were closed this past weekend? Passing through the tube station I
heard a PA announcement about how pax could buy tickets at the far end
of their journey, and then later saw the closure flagged on the
results of a journey planner query.

As far as I could see from a quick glance there wasn't any obvious
physical reason for them to be closed (e.g. obstruction etc), so my
guess would be that the power supply (and/or comms) was cut off for
some reason as a result of the works going on at the station - but I'd
be interested to know the actual explanation for it.