Transport Secretary Patrick McLoughlin has defended the controversial High Speed 2 (HS2) project amid claims it could cost some cities hundreds of millions of pounds.
Mr McLoughlin insisted he had "no doubt" that the scheme would benefit the UK as a whole, describing it as "vital" for the long-term health of the economy.
The comments came after previously unreleased research listed more than 50 areas that are likely to end up worse off - including Bristol, Cambridge and Aberdeen.
In September ministers hailed the KPMG report for concluding that HS2 would boost the British economy by £15 billion a year.
ITV News' Political Correspondent Claire Stewart reports:
The report listed the areas that would benefit - such as Greater London by £2.8 billion and the West Midlands by £1.5 billion - but it omitted details of those that would end up worse off:
- Aberdeen - £220 million worse off
- Cambridge - £127 million
- Bristol - £101 million
- Essex south - £151 million.
The full findings were released in response to a Freedom of Information request, and passed to the BBC's Newsnight programme.
Mr McLouglin said that the net benefits for the country would outweigh the negative impacts:
The chief executive of HS2 Ltd, Alison Munro, said that the places that are on the high-speed route are likely to benefit most from the project.
"But high-speed two isn't the only investment that the Government is making. Over the next five years it is planning to spend £73 billion on transport infrastructures," she added.