There are fears that officials who drew up the HS2 route between London and Leeds may have done it on maps that are out of date.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
Longest cold spell of winter so far. Bitterly cold with further wintry showers, significant snowfall likely over hills
Demonstrators will gather in Lincoln this morning to protest against proposed cuts to the city's local fire service.
Jon Mitchell with tonight's weather