Cumbrian MP, Tim Farron, has spoken out over the decision to rerun the competition to operate the West Coast Main Line.
The Westmorland and Lonsdale MP said "people must be held accountable" for the errors.
FirstGroup was due to take over the franchise from Virgin in December.
Scotland's Transport Minister will outline his concerns at Holyrood
Russell Brown MP, has described the admission of flaws in the West Coast Mainline bidding process as "an utter shambles".
The competition to operate the West Coast Main Line has been cancelled after flaws were discovered in the bidding process.