Power Cut Load Blocks Explained: What Your Block Letter Means
Your postcode sits in one of 18 electricity load blocks, lettered A to U. Here is what that letter means, how the government rota decides which blocks lose power first in a national supply emergency, why blocks A-K and L-U fall on different halves of the week, and which of the two rota plans would actually apply.
Gas & electricity · 21 Aug 2026
