Fair point - thank you for the link. They don't, however, like it or encourage it. States that in the summary, and two people I know who did emigrate legally had it strongly suggested that they give up their original nationality (One UK, one Aussie).
I wouldn't. Got 4 nationalities (with matching passports) already - why would I give any of them up?
Far easier for me to just overstay and disappear.
As if you'd listen to anything the government told you that didn't make sense and/or wasn't accompanied by the wrong end of a gun.