Me? Human race. (Maybe a bit of Martian?)
Of a dozen JW window cleaners I know locally.
Mostly white British.
One black British. (Real character, late 50's, I asked him whether he preferred "black" or "coloured" and he said he couldn't care less - married to a white woman; he has a collection of Robertson's Gollywog figures on his fireplace!)
One white half American-half Norwegian by descent but British by birth - unusual accent.
One white South African