There are fears that officials who drew up the HS2 route between London and Leeds may have done it on maps that are out of date.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.
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Weather forecast for the Calendar region with Kerrie Gosney
Cold air from Canada will turn showers wintry overnight into Monday morning. Snow could settle over higher routes. Icy patches possible.
A very windy spell Saturday evening, and remaining gusty into Sunday. Colder air by the end of the weekend - sunshine & wintry showers.