East Anglia (I'm being a lot less precise than those who talk about places like Kilburn) is supposedly quite well Poled-up. This may be a comparitive thing as this corner of the country has seen very little immigration since the Vikings came over.
South Africans
I have known a small number of nice South Africans, which goes against the grain somewhat, especially of the Spitting Image song. Afrikaans ain't exactly beautiful, melodic, soothing, pleasant or bearable. When they get together with Australians, the result can be very nasty. I must add: that's not all South Africans.