Certainly UK and EU for that matter are capable of keeping the lights on. What is newsworthy is that they are having to abandon the “green renewable” pipe dream to do so. This will come as no surprise to reasonable people who have long seen through the narrative, but seldom so transparently obvious.
It sometimes seems that this is one of those issues in which FR gets trapped in obsessive dualism: A is better than B, therefore A is good and B is bad, therefore under no conceivable circumstances has B anything to offer, and the possibility that B could usefully complement A, with a consequent net gain, is not considered.