Anecdotally, the stereotypical British farmer is a wealthy Tory, and low income populations are concentrated in council estates in postindustrial northern towns and cities (i.e. not the countryside).
to most non-brits, Britain is effectively divided between "London" and "anything else". This "anything else" can be referenced to, more or less interchangeably, as "the countryside", "Scotland" or (after Game of Thrones) "the North". Manchester is basically a London suburb, Sheffield is just a factory that closed in the '80s, and Birmingham doesn't exist.
From my US PoV, most smallholder farmers in the UK are not rich or wealthy, but almost subsistence --perhaps better than break even but do not generate enough income so one partner has to keep a professional job.
As for post industrial rust-towns, I think of the northeast/Newcastle, Humberside & Scotland --maybe influenced by 'The Post War Dream' and Kris Killip's photography.
Maybe it's a matter of perspective: If you buy a million pound property to live in and keep as a hobby farm that also generates a little bit of income, are you "subsistence" or in fact "very wealthy"?
Anecdotally, the stereotypical British farmer is a wealthy Tory, and low income populations are concentrated in council estates in postindustrial northern towns and cities (i.e. not the countryside).