This is one of those articles that while true, is unhelpful to the point of deliberate deception. The UK has energy trends posted here through September. The relevant table is 5.1 on page 42 of the PDF. Dropping the middle section of that table into Excel, adding the coal and gas TWhs and dividing it by the total TWh, the combined coal + gas has varied between 46% in 2015Q4 and 57% in 2014Q3. For 2016Q2, it was 49%. So what's up with the article? Coal is down about two thirds, a full 10 TWh less than the previous quarter. But total generation is down 14 TWh. Gas is up slightly from the previous quarter and up 50% from the previous year. If the 2015 trend applies to 2016, coal will be back up for the winter heating load. The article seems to be trying to paint a certain picture: solar is beating coal. That's true in the moment, false on an annual scale, and there's been no shift in reliance on fossil generation.