I lived in London in the early 70s - and yes, this is out it felt. Perhaps it was different in the deepest Shires.
And yes, very insular when I moved to Stoke-on-Trent. At the Engineering Works where I worked, I was considered very 'exotic and different' - but always warmly welcome. Welcome by colleagues into their own homes, and to join in. But I suppose my best memories of the above- was when we moved to Leicester. Yes, we moved in at the same time as the Ugandan Asians- and I remember the awful comments, and all the vitriol when kids were bussed to County schools, etc. I remember how some people went berserk when the Park next to the Prison was renamed Mandela Park- how it was shameful we were naming a Park after a terrorist, and a black one at that. The racism was dreadful. But then it all settled, and people learnt to live together, and it was heart warming and so impressive. There was something so special about Leicester in those days- which was rare and almost unknown anywhere else, not just in the UK, but in the world.
And I shall always, always, have a part of my heart there- even though my daughters and grandchildren now live in very different parts of England.