As an American who has lived and worked in the UK, they are very similar for the most part.
London folks are pretty much interchangeable with those in NYC.
Mid-sized cities further north like Manchester seemed to have people similar to those I’ve seen in Philly or Boston.
The people out in the smaller villages seemed a lot like what we have in our smaller Northeastern towns. Many a little more working class in terms of values, but they would get along if they met.