From afar, Britain appears to have fallen for the same schtick as American voters, even those who have little to nothing to gain from the policies for which they vote. My parents were somewhat the same...Mum voted Labour, Dad Conservative. She knew which side her bread was buttered and who party had anything of worth for the family, while Dad aspired to be someone who would one day have more.
When I look at Britain today, Manchester is not nearly as representative of the general belief that upward mobility is not only possible but achievable, and possibly within easy reach for some who feel like they are already on at least a lower rung of the economic ladder. I see it even on this Forum, between those that are doing halfway decently and those that are perhaps not doing as well.
The sentiment in identity politics today appears to have been successful for the Right, identifying those on the Left as moochers and people looking for a handout, who are reliant on the state to have anything or make anything of themselves, while the Right are self reliant, aspirational rugged individuals who have worked hard to get themselves ahead and deserve all the success they have achieved, because they achieved it themselves. They deserve to keep more of that hard earned money through lower taxes, which the Left want to pay for all their services and benefits.
Now, as a population, who wants to be identified as "Right or Left" in those caricaturish depictions? In America, even those who might more accurately fit the mold of the Left often vote Right, because they simply don't identify themselves as Left, all evidence to the contrary, because they are taught to see themselves (and definitely prefer to identify themselves) as the rugged, self reliant, individualist of the Right. Indeed, the Southern Tier states of the U.S. take vastly greater sums of Federal monies into their states than they contribute to the Federal coffers. Ironically, it is those "Blue" Leftie urban centers and states that contribute the vast majority of Federal dollars to those states full of "rugged individualists!"
In short, the propaganda of self-reliance, as if everyone has the choice given their circumstances, has tried to portray anyone requiring state aid, no matter how briefly or necessary, as a weight around the neck of the country and those who are working so hard to create their own futures. It is cynical in the extreme, but it plays to people who see themselves as good citizens who contribute to the betterment of society, even if it is actually them it is often negatively portraying.
There are no easy answers to societal problems, but when politics seeks to stratify people and pit them against each other, it will always be those who have (and have the most) who will continue to gain at the expense of those they have divided into factions fighting each other. Without the consensus politics required to corral, control and even negate such cynical politics, those with all the advantages will simply milk those advantages to the fullest extent possible for as long as possible, further widening the gap and exacerbating the underlying problem.