They are making so much money from Network Rail they can probably just sustain things as they are:-
£20,000,000 a year profit from delays!
http://www.telegraph.co.uk/news/2016/11/17/is-yours-the-rail-network-which-has-cancelled-the-most-trains-in/
Rail companies paid out £45 million in compensation to delayed passengers in England and Wales during the past year while receiving £105 million from Network Rail for unplanned disruption, new figures show.
Govia paid compensation claims worth a total of £2 million during 2015/16, while Network Rail's bill in relation to the lines in South East England was £22 million.
£20,000,000 a year profit from delays!
http://www.telegraph.co.uk/news/2016/11/17/is-yours-the-rail-network-which-has-cancelled-the-most-trains-in/