if I walked into a room where there three tables, one empty, one with a coloured person, and one with whites, I would sit with the whites, not because i am in anyway racist, but I would worry that the coloured person might not speak good english, and a conversation would be embarrasing for me, to keep saying " sorry, could you say that again". i also think that if the next person in was coloured, they would probably sit with the coloured person.unless they had been born and bred in Britain, then they would probably be more racist than any white person and go and sit with the whites.
I have seen this so many times, that I now make a point of speaking to all coloured people that i meet at the baby and toddlers club ( I baby sit )just to see if they are really black or white under the skin. made some good friends who are proud to be black and promote their ethinic culture and are also very proud to be British.