Legal experts are urging anyone who is receiving letters about claiming mineral rights under their properties to take legal advice.
Homeowners in Carlisle are among people from all over the UK to get the notices. Richard Miller from Burnett's is one of several solicitors dealing with queries.
For more information and advice on the issue of mineral rights, visit the Land Registry website here.
More top news
Campaigners gathered in Kendal for a victory rally, after a decision to keep the town's Kentmere mental health ward open.
Emma Jesson brings you Saturday's forecast for the Border region
It is the final chance for people to have their say in Stage Two of the public consultation into a new nuclear power station in Cumbria.