Sorry, but this does not go far enough. What is deemed to be a serious offence? Murder? Yes of course. Rape? Yes. Violent acts? Certainly.
But what about those who have committed burglaries and theft? What about persistent petty offenders? Are they to be rewarded with residency?
The rule should be, if you have come to the UK and committed a crime, any crime, then you are not welcome. We’ve got enough home grown villains. We don’t need any more, thank you.