In this video, I’m at the National Grid Training Centre because Britain’s electricity system is, in a very literal sense, turning inside-out. For decades, power mostly flowed from a small number of big power stations out to everyone else. But as more generation shows up in different places — and as demand changes — the grid needs new routes, new capacity, and a lot of upgrades. And that means one thing that’s about to become much more controversial: pylons. I climb a pylon in a controlled training environment to show what this infrastructure actually is: not just “metal things in fields”, but the physical, engineered backbone that keeps the lights on. The takeaway is that the arguments people are about to have aren’t really about steel latticework — they’re about where we put the unavoidable bits of a modern power system, how we balance local disruption against national need, and what it takes to rebuild critical infrastructure in a country that already has opinions about everything. If you’ve heard about the Great Grid Upgrade, this is what it looks like up close — and a bit higher up than most people ever get.