It hasn't happened since the 1880, namely since the industrial revolution undertaken by UK now engaging a new – and cleaner – revolution. The announcement was made as the era of social media imposes: via Twitter the National Grid (the power grid operator) twitted that on 21 April, for 24 hours, any coal for electricity was burned. Instead, they used gas and renewable to supply the population. Shortly after, Grid has released new 140-character messages to point out that the only coal-fired power plant was switched off the previous day and that half of Her Majesty's electricity comes from gas plants, about 30% from renewable energy sources and the rest from the atom.
Also last year the fuel had disappeared for a couple of hours from the British energy mix, but now the future target is to completely eliminate coal-fired power plants. Yes, but when? By 2025, according to the government calendar. An abandonment that is involving the entire European continent, something that only a decade ago was unthinkable, as the withstanding a whole day without coal. A reduction in use due to the intensification of measures to contain Co2, the increasing competitiveness of gas and the collapse of renewable costs. And even in the United States, despite Donald Trump’s crusade in defense of coal, the latter will not survive according to experts’ statements, convinced that the convenience of shale gas is difficult to be surpassed.
Certainly, April 21st will remain in Britain's history, since for centuries London has closely linked its history to that of coal, which led it to become a world's economic power: from the impetuous development of factories to the long strike (1984-1985) with which the miners tried to withstand the dismantling of the first mining sites by the Iron Lady. And now, UK is ready to say goodbye to it.