There is no such thing as 100% equality in anything, it doesn't exist and will never exist... where it could probably exist is in theory only.
As for affirmative action or social engineering. If you are to lower to standard to attain such figures than your goal of creating equality is akin to creating rubbish. Just like you can't legislate the poor into prosperity by legislating the wealthy out of prosperity you can't change things just by having preferential treatment. I find it strange everyone talks about meritocracy but would bend over backwards to accommodate a racial based system.
Is UK too white? No it isn't, if anything UK is one of the easiest places for an ethnic minority to make a good living, question is whether they WANT to do something about their life and access to resources or prefer waiting for benefits to fall onto their laps.