This is precisely what I've been hunting for!
Property prices in London are fucking extortion - if you were looking for a minimalist bachelor pad, say 35 square metres, you'd be looking at over £100,000. But a small village for not even that? That's a steal is what it is.
Add together the fact that I speak Spanish (5 years in school plus practicing on the occasional tourist) makes it even more tempting.
I've also worked in construction, currently at a design firm, so I've got knowledge of the basics to get things up and running. Admittedly not so much in a rural capacity but there's got to be some overlap.
The only issue I foresee is money. I've got a few thousand saved up but I don't know if that would be enough for a deposit, let alone to secure finance for a project like this.