Cities across the UK could lose up to £220 million each as a result of HS2, according to previously unseen research.
The proposed HS2 link will connect London to Birmingham, Manchester and Leeds. A report by KPMG found that places away from the line will pay a price.
It's claimed that Cardiff could be almost £70 million worse off.
The full findings of the KPMG study into the business case of the high speed rail route were released following a Freedom of Information request by BBC Two's Newsnight programme. The chief executive of HS2 Ltd told the programme the figures were unsurprising.
More top news
Helen Plint has the latest forecast for Wales.
The Labour conference has voted to give the Welsh party more autonomy, despite opposition from supporters of Jeremy Corbyn.
Matthew Barzun says he like to visit places outside London, including Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch