When I first heard that on the news, I wondered if it was that ionospheric EMP I've been dreading for the last three years, albeit confined to a certain region – but it's not!

In fact, judging from the
Wikipedia talk page that hypothesis is probably hogwash, and seems to have originated from that very Sky News article!
Jesus… yall think this will happen again?
So it seems the root cause is unknown for now, but these things are usually a case of a few unfortunate things lining up together, then something trips, then everything else is more loaded so something else trips, then bang, bang, bang. It happens. But unlikely to happen again soon, hopefully!
Yesterday I fell into a rabbit hole of watching these kinds of videos:
Then this happens at a much more enormous scale!

Also I watched Heartbeat tonight and coincidentally the episode they showed involved a power cut!
–––
Anyhoo, good to hear you're all right Dave, stay safe!