Certainly, the Romans used to have vineyards in Lincoln, so with modern cultivars it doesn't surprise me to see them being grown commercially in more northerly areas.
What, if anything, that says about global warming I know not.
It says to ignorant ( and gullible ) people that it is a new thing, therefore manmade global warming must be happening. AGW is, and always has been and always will be nothing more than a theory. Lol, as if super-accurate thermometers and recording stations etc etc existed hundreds of years ago, against which today's statistics are compared. And Arctic ice, the poster-boy for global warming, has only been charted via satellite since the 70s - absolutely nothing in the scheme of things, and has always waxed and waned in volume and extent. Those that say something is amiss are plain wrong and don't have your best interests at heart. 'Climate scientists' will never backtrack after all these years, having gotten this far in promoting their agenda and losing the income from those who pay them to advance it. Turkeys don't vote for Xmas....