But these small victories were easily overshadowed by the outages at the North Yorkshire site, which halted generation at one of Drax's biomass units. A further two units were affected by problems delivering the biomass pellets the company burns to generate power. Three of the Drax's units now use biomass instead of coal to help produce around 6pc of Britain's electricity. A fourth unit will be converted later this year to burn the pellets, often made from compressed sawdust, before Drax decides whether to move ahead with plans to convert the final two coal-fired power units to burn gas. "Drax continues to be at the heart of decarbonising UK energy, securing Government support to convert a fourth unit to biomass and piloting a Bioenergy Carbon Capture and Storage project, supporting the UK Government's carbon capture and storage ambitions," Mr Gardiner said.