After years of waiting the first UK geothermal hot rocks energy project started drilling today in Cornwall.

The rig, operated by British company Geothermal Engineering Ltd, on Tuesday starts what will be the deepest ever onshore well in the UK — at 4.5km it will be the equivalent of 14 Shard skyscrapers — in an attempt to generate the UK’s first geothermal-sourced electricity

More news and background information from the Cornwall site on BBC news, The GuardianFinancial Times and daily updates on Twitter @uniteddownsgeo.