Despite the rail operator’s new-found profitability , it has asked for an extra £29 billion in addition to the £4 billion a year that it already receives in subsidy (link below.)
http://www.timesonline.co.uk/article/0,,2-2474963,00.html

Mr Armitt , the former chief executive of Costain , the construction company , said that he expected Network Rail’s profit to remain at similar levels in the future.

He also predicted that the Government’s renewed focus on greener forms of transport would bolster its request for £29 billion to renew the railways and expand capacity.