How about doing it this way.
Ok, we are going to have a Brexit vote.
You do not have to vote, however we are going to deem a non vote as an acceptance of how things are, so there is only a need to vote if you are against the current policy.
Hey it hadn’t stopped remainders from claiming that it works like that currently; over and over and over and over again. Even now three years on we have whole threads started like it is that way by remainers.
And they said those voting for brexit didn’t know what they were voting for. It would be so funny if it wasn’t so sad.