It's not the same reason (the 30% point is usually about how much demand-shedding is possible if you get a period of high demand and low production from renewab

It's not the same reason (the 30% point is usually about how much demand-shedding is possible if you get a period of high demand and low production from renewables) but due to the current period of exceptionally low demand and the high share of renewables, the UK has had to start taking some emergency measures already: https://www.bloomberg.com/news/articles/2020-05-07/u-k-grid-pays-to-cut-power-supply-to-keep-the-lights-on https://www.bloomberg.com/news/articles/2020-05-07/u-k-grid-...