There are fears that officials who drew up the HS2 route between London and Leeds may have done it on maps that are out of date.
It's been claimed a waterways project in North Derbyshire which was completed more than a year ago is missing from the HS2 route map released last month.
The group that spotted the mistake is calling for talks with the Government. Ben Erlam reports.
More top news
An independent review says Grantham A and E should be reclassified as an urgent care centre.
The money will contribute towards a £3.7m programme of improvements
Prime Minister Theresa May said in October the Government will shift towards an organ donation system in England which presumes consent.