The UK's first geothermal power plant goes live this morning, providing continuous renewable electricity to up to 10,000 homes using hot water from underground. The Cornish plant took nearly two decades to develop and required drilling the deepest onshore well in the UK. Ryan Law, head of the geothermal engineering company and the plant, explains that the fuel comes from underground, with no price fluctuations, and is not influenced by geopolitics, weather, or gas costs; it is always available.