When I left the UK, around 8 years ago. I had already spent many decades in Asia. I can think of nothing to add with regards to culture from the UK.
I was living in Birmingham when I left last time.
West Bromwhich is like Jamaica.
Capehill and Smethwick are now mainly Pakistanis.
The main Birmingham road from the WBA fc ground into Birmingham is Indians.
Every part of Brum as I call it has sub cultures everywhere you look.
British culture is lost in time.
London, Leicester, Bradford all lost to alleged minorities.

When you have mayors from abroad, and even a crime minister from abroad, then look at the amount of corrupt polis named ticians from abroad, you understand why.