I remember doing a bit of spare time research into getting power from the Sahara desert when I was a school kid. The idea is obvious - solar power requires lots of sunshine and land that isn't being used for anything. The UK doesn't have that, the Sahara desert does.

If it's an idea obvious enough to occur to a teenager 20 years ago it hardly requires politics to explain why it comes up now, does it? At the time I gave up on the idea because either I didn't find out about HVDC or it wasn't as effective as it is now. Transmission losses seemed to kill the idea. Now apparently that's more or less solved and other issues dominate like manufacturing costs and mineral availability.

As for renewables being abundant near by - where? UK already built tons of windmills. You can't get baseload-level renewable power from adding more of those because there are days when the wind stops blowing. As for solar in Europe, land is at a premium there and they're already wanting to use available resources for their own needs, rightly so. Also worth considering - for unclear reasons global wind speeds have been slowing down over time. Long term wind projects need to factor that in to their economic calculations. Solar doesn't have that issue.