Yup, Brit here. It beggars belief. And the leaders will continue to be so stupid, because the other party will also make this mistake too.
And that's before we add heating to the winter electric load. Conservatively, and I am really trying here, you're doubling grid load. If we go by my household, you're adding a zero.
I can find multiple >12 hr periods in this fairly mild winter where wind has essentially failed on demand (<5% satisfaction). I'm sorry but if someone says "storage" when talking about even that sort of shortfall they're lying.
France goes through similar bouts of having to import because so many of their nuclear plants keep having to offline at the same time.