I have been living in Brighton for five years unaware that “hot rocks” far below my feet could soon warm my home with a clean source of heat.
This Roman Bath-style type of heating system has been detected in 45 areas of the country, including Eastbourne, Middlesbrough, Sheffield and York, which have the greatest potential for deep geothermal energy.
The process, used in abundance in Iceland and which heats 250,000 homes in Paris, typically involves sending water at least 500 metres down boreholes to be heated to around 100C before bringing it back to the surface.
