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
Through this evening and overnight it will remain cloudy with some persistent rain and drizzle by dawn.
A couple from Wales, who moved to South Africa to live 40 years ago, have been killed on their farmland estate there, police have confirmed.
Our Valleys Correspondent Hannah Thomas has been spending time discovering why the people who live in the Valleys love their communities.