I'd say that Britain never really had a nationalist movement, because it had its anti-monarchist revolution before nations really existed, and basically became an empire at the same moment in time. So there was never really a great drive to invent a unifying British identity (compared to, say, 'Frenchness' or 'Germanness') - past the stuff that people sell to tourists, like red buses and policemen that let pregnant women piss in their helmets.
So since the empire collapsed after WW2, everybody has been casting around for some kind of identity, more and more frantically as more and more bits of the empire have sloughed off. Since Brexit, it's got a bit weird, with all politicians making all statements in front of massive union jacks, and I expect it will get weirder still when Scotland leaves.
Hopefully, the national conversation will arrive at the conclusion that heterogeneity is no bad thing, and we should simply devolve power (cultural as well as economic) to a local level rather than trying to enforce a kind of Disneyfied Boris-Johnson style 'Britishness' on everybody, but I'm not holding my breath.
I disagree. There used to be a very distinctive British identity, mostly associated with English upper-class ideals. The lower classes were periodically coopted into this identity, either after the industrial revolution that triggered mass-education or during periodic conflicts, and their aspirations were then pushed outward to colonize “inferior” people. This is how the British empire was built, and it definitely was nationalistic in outlook.
Of course, the mechanism eventually broke, because of the slaughter of WW1 put the lie to the dream and the rise of continent-sized superpowers put it materially out of reach. Since then, coopting lower classes into upper-class ideals has been unfeasible. A replacement emerged in the heyday of socialist movements (everyone eating the same food, working in the same factories), but then died off, as that way of life also disappeared. What followed is not homogeneous, I agree on that, but I think you’re discounting the strength of what was there before.
So since the empire collapsed after WW2, everybody has been casting around for some kind of identity, more and more frantically as more and more bits of the empire have sloughed off. Since Brexit, it's got a bit weird, with all politicians making all statements in front of massive union jacks, and I expect it will get weirder still when Scotland leaves.
Hopefully, the national conversation will arrive at the conclusion that heterogeneity is no bad thing, and we should simply devolve power (cultural as well as economic) to a local level rather than trying to enforce a kind of Disneyfied Boris-Johnson style 'Britishness' on everybody, but I'm not holding my breath.