Official data released today showed coal made up 5.8 per cent of the UK's power mix during this period, down from 20 per cent the same time a year ago. It also marked the lowest share since records began in 1998.
It came as the share of gas grew to 45.2 per cent amid a " large switch in generation from coal to gas ... which will have reduced carbon dioxide emissions."
The UK government wants to shut all of the UK's coal-fired power stations by 2025 to help reduce its carbon emissions. While this will make it easier for Britain to meet international climate goals, critics worry it comes with a greater risk of blackouts.
Britain recently enjoyed several days of coal-free electricity generation for the first time in more than 100 years, signifying a major shift taking place within the UK electricity system.
But renewables' share of electricity generation fell to 24.9 per cent in the second quarter from 25.4 per cent a year ago. This came despite more wind, solar and biomass installations which were hit by unfavourable weather.