That's a rather ignorant comment.
The 'Great Repeal' bill as it was called was/is - I lose track of where it is in the law process at the moment - effectively did/will do a 'mv' of all EU regulation that the UK was beholden to over its own UK laws and when this has to be done before the UK leaves and will probably be done sooner.
Then the parliament will cherry pick the bits they want to keep and update/change/remove those that we do not.
> I'm assuming you mean the 30% who actually voted to leave?
Actually while the Brexit vote to leave was significantly more than 30%, the past polls that have asked a more specific question of sovereignty/law making by the EU commission that seems to override UK Law is significantly larger than the amount that voted to leave.
Voting Leave != Does not like EU Commission making Laws by people the UK did not and cannot vote out.