"Disadvantaged" is not something that is defined purely by race (atleast in the UK) The key factors that are considered in your university application are all pretty much pure contextual factors IE; income, poor academic performance family history of higher education etc..

If you are of Asian descent in the UK the biggest factors to determine if your going to get into a program like this is not your skin color. Its an evaluation of you and your family's history and providing ascent to people less fortunate.