+x+xWind only accounts for 20% of production and it's also there in the first sentence of the article;
"National Grid has warned that Britain’s electricity will be in short supply over the next few days after a string of
unplanned power plant outages"
-PB
“System operating at reduced capacity due to low wind speeds”
“Unusually low wind output coinciding with a number of generator outages means the cushion of spare capacity we operate the system with has been reduced,” the company told its Twitter followers.
So the implication is there isn’t enough wind power at times, and the back up generators are out, which proves you cant have reliable energy without substantial base load power, e.g. coal and gas. In fact wind can at times produce as low as 10% of UK’s energy mix which means you would need to maintain 90-100% of the existing coal mining, fracking and coal/gas fire plant infrastructure to provide energy during periods of low wind speed. When those plants reach the end of their operating life, if they are not renewed and new ones not built (due to expanding population) there will be constant power outages because there isn’t enough base load (back up) capacity. When you understand this the economics and logic of renewable energy are thrown out the window.