I'd take a bet the future wilo pretty much be the world portrayed in the science fiction TV series Firefly (without the space ships - replace those with electric cars - and the total bilingualism, English will probably still be the major world language, even uf America goes full on gun toting civil war like it almost did this time last year). This includes food shortages, artificial or synthesised food, overpopulation in some areas and a wild west border vibe in others, beyond currently comprehensible technological advances for the wealthy and subsistence level existence for most people.
The UK will have broken up, at least Scotland will probably have gone, taking her rainfall, whisky, oil, and porridge oats with her, and Ireland will be on the verge of reuniting, taking her fresh produce, beef, dairy, and porridge oats too. Not sure about Wales at this point!
Those dreaming of a world without the NHS, free education for the ordinary working class, and anything resembling a welfare state are likely to get their heart's desire but I don't think it's going to be quite the utopia they imagine...something that regularly eludes those banging on about private health care is where, exactly, those private clinicians are all going to come from. Though of course AI might have replaced HCAs by then...
And then there's climate change, which will affect us even here on untouchable Plague Island, especially if you live at the coast, even in pretty little enclaves like Devon and North Yorkshire. There are interesting flood maps out there but I'm not sure they currently take what's happening in Greenland and other places into account.
To get a good idea of what that world is probably going to look like, one option is to take a current situation and follow it through to its logical conclusion.
(For anyone who thinks we couldn't have or didn't predict the current pandemic, as just one example, there are plenty of pandemic plans and risk registers out there even now that show a pandemic has been on the cards fir a very long time. What seems to have been left out were the effects on the economy and people's mental health, particularly for the younger generations, a situation currently in the very early stages.) Historians, scientists, and many medics have been pointing out the likelihood for decades.
The only thing that is absolutely certain, though, in any future, is that the rich will continue to get even wealthier and more insulated, life will get harder for most of us, and people will continue to elect governments that don't give a monkey's ass about their people when it boils down to it.
Oh and we'll probably still have the FPTP political system in England, the current Prime Minister's wife will be firmly ensconced as Bad Galadriel, Ruler of the Free-to-her World, and anyone who dares to protest about anything at all will have been thrown into the Tower or local equivalent until a suitable more permanent solution can be found...!