I live in a "leafy enclave" now, but for several decades I lived in a very racially mixed part of Croydon: not the tree-lined 'burbs of South Croydon, but the West Croydon/Thornton Heath borders. The local primary had the largest proportion of non-white children of any school in the borough and a very high proportion of children entitled to free school meals.
It was a lovely mixed community. My next door neighbours were of traveller heritage, there were several south Asian and Afro-Caribbean families, at least one Irish family, and 2 Vietnamese families in my stretch of approx 25 houses. When the kids were playing football on the green, it looked like an advert promoting racial harmony.
I found it fucking weird when I moved away from London. The town I live in now was so white back then that anyone with brown skin stuck out like a sore thumb.