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Some of this is going to end up depending on the wind. The chart on page 13 of your second link shows 16.1% wind of every single day for the period. So that's about 4GW, day after day. That's a placeholder, because we have no sufficiently accurate long range forecast. The reality, hour by hour could be 15GW and it could be 1GW.

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Yes definitely agree.

Overall the UK grid is probably too dependent on wind energy, with all the variability that involves.

Right now gridwatch.org.uk is showing about 13.5GW from wind (40% of demand), but I've seen some days when there has been well under 1GW.

Probably. The trouble is that we're committed to net zero, and there isn't much of an alternative to relying on wind energy this far north unless you have better sites for hydroelectric than the UK or can make nuclear work somehow. The UK does at least have a decent amount of offshore wind which is a little less intermittent than the onshore variety.

We're not yet in a place where we routinely make so much wind power that we need less rather than more.

We need a lot more storage, even battery storage plus wind is way cheaper than current gas shortage induced prices, and both wind turbines and batteries are getting cheaper

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