The Transport Secretary Patrick McLoughlin is speaking at an annual gathering of rail industry experts in Derby.
It follows the West Coast mainline franchising fiasco, and Bombardier's failed bid to secure the Thameslink contract.
Addressing the forum, he said of the West Coast mainline contract:
My department did make some very serious mistakes, but I have taken action to put them right.
On the High Speed Rail link, he has said:
The biggest benefit of HS2 will be increased capacity.
The true cost of the fiasco over the West Coast Main Line franchise is only just beginning to become clear.
A critical report by MPS has condemned the £50 million cost to the taxpayer caused by the West Coast Mainline fiasco.
Transport Secretary and Derbyshire Dales MP Patrick McLoughlin has told MPs today that mistakes over West Coast should not have been made.