In message , at
05:42:21 on Sun, 9 Apr 2017, Paul Corfield remarked:

The only real crunch point is if the new timetables in 2018 prove to be
a complete disaster and then there will be monumental pressure GTR and
DfT to "do something". Until then I think GTR will be left to get on
with it.

And won't that be Network Rail's fault, rather than the train operators?
--
Roland Perry