Wind and solar farms power Great Britain’s grid to greenest ever summer

Exclusive: Reliance on fossil fuels fell in August to less than one-fifth of all electricity generated across country

Great Britain's electricity system has recorded its greenest ever summer after growing numbers of wind and solar farms cut the need for gas power plants to fresh lows.

Analysis of energy generation data, commissioned by the Guardian, revealed that Britain's reliance on fossil fuels fell in August to less than one-fifth of all electricity, or 4 terawatt hours (TWh), its lowest ever level for a one-month period.