Briton here. The vast majority of people will not care at all.

I object to the term 'cynicism'. Inductive reasoning, maybe. There's nothing inherent in the definition of a British person that necessarily includes apathy towards current affairs.

But most swans are white, there's nothing cynical about that, and similarly I say with no cynicism that most British people forgot about this five minutes after hearing/reading about it, if they heard or read about it at all.