Why is the Asian population over taking the Caribbean black and African black population in Britain?
Well depends if one Caribbean Blacks are not having children together i.e they are mixing then yes you are right. But Black women in the US have a mind set that they want to raise a strong Black family if women in Britain do not share that will then I bet you will slowly loose ground in population. Not saying they will not IR marry but they really must love the guy to do so. Black men I hate to say do not always have such a focus on family as Black women their better half. Some also inter marry for the wrong reasons almost ashamed of who they are and where they come from. The Asians probably do not IR marry nearly as much. So basically you probably answered your own question.
