That's 3% of the UK population.I see what you're saying but honestly I don't see that as an excuse for massively dating out either. Of course there are going to be some interracial dating in the UK but being a minority doesn't prevent you from finding someone of your own ethnicity to marry with, unless you live in an place isolated from your people. Now I don't know how it is currently in the UK so maybe a breh from there can tell us more.
You're going to date out that point especially if you're 2nd/3rd+ generation.