The UK passed 300 hours of coal-free generation on Thursday, the National Grid said, as mild, windy conditions reduced the need for older power plants. Receive daily email alerts, subscriber notes & personalize your experience. Register Now Data from National Grid showed zero coal-fired generation since May 18. The UK power mix was also coal-free in the first week of May before the dark matter was brought back into use following a few gas-fired plant outages on May 9. According to S&P Global Platts data, month-ahead profit margins for 35% efficient coal-fired plants remained in negative territory Wednesday, at minus GBP16.20/MWh ($20.5/MWh). A key reason for the reduced need for coal-fired power has been the rapid rise of renewables capacity, mainly solar and wind. Other factors include carbon pricing and the relative cheapness of gas. As an example, UK power prices fell below zero for nine hours […]