Nope, Scotland over produces and sells to England, but that's still UK, at least for another month ;-)

Offshore wind was included in the impossible. There's something off in his figures. Perhaps wind turbines have become more efficient since he first made his calculations?

It may also be diminishing returns, not all land is equal for wind turbine placement. If all the "good" spots can't generate enough for the UK's needs you might need to start using less suitable locations.

By far the most efficient wind turbine placements are offshore. We have plenty of coast, and so far very little of it has offshore wind farms.

We also have a good few estuaries that could create electricity relatively easily - using known and proven technology, which fusion certainly isn't.

Bottom line is these figures are either incompetent or disingenuous.

I'm old enough to remember fusion being touted as the Next Big Thing for literally all of my life. Commercial containment fusion seems no closer now than it did fifty years ago.

There are alternatives, but they're highly speculative. Dropping YC cash on them makes sense as a long shot, but the science doesn't suggest it's wise to expect them to make good.