The same rules on intestacy (and on probate for wills) apply in England and Wales and Northern Ireland to everyone. (Scotland has different rules but, again, there's no difference between people of different ethnicity or religion).
Asian communities often place greater reliance upon extended families than Europeans do. It's probably far more likely that a British Asian will live close to his/her parents, grandparents, cousins and other relatives (and have frequent contact with them), than it is for a white Brit to do so. So it may well be less likely that here is work for heir hunters to do within the Asian community (simply because there's rarely a problem with tracking down the beneficiaries of an estate).
Chris



