There are fears that officials who drew up the HS2 route between London and Leeds may have done it on maps that are out of date.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
Weather update with Jon Mitchell
Jon Mitchell's evening weather update
Patients and carers have come together to ask candidates in the upcoming General Election how they plan to improve the NHS.