It is still being built and they have a very good deal that means every house hold in the UK will be paying over the odds to give it guaranteed profits for decades to come.
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.