This written answer from Petrol-head Hammond given on 2nd June 2010...
John McDonnell (Hayes and Harlington, Labour):
To ask the Secretary of State for Transport what assessment has been made of the impact of planned reductions in his Department's funding of rail in 2010-11.
Philip Hammond (Secretary of State, Transport; Runnymede and Weybridge, Conservative):
My Department has agreed to contribute a total of £683 million to the £6 billion of in-year budget reductions sought in the emergency budget.
As part of this Network Rail has indicated that, subject to the consent of the Office of Rail Regulation, it will reduce its requirement for Government funding by £100 million.
I am clear that similar efficiencies can be driven from the large organisations to which the Department for Transport makes grants, such at Network Rail, as can be found by the Department.
Interesting.
And there was Eye thinking that NR's efficiency savings were determined by the ORR.