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.
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Cloudy with outbreaks of rain, heaviest in west
Emma Jesson brings you Sunday night's forecast
The Met Office have issued a yellow "Be Aware" warning of heavy rain for the region which is valid from 3pm Sunday until 3pm Monday