OK, I a. being tongue in cheek (a bit), but how about an idea?
We are still part of Europe and will be for some time to come whilst the negotiations carry on. And whilst we are part of Europe we have free movement. And we have been told that everyone who has moved will have the right to stay where they are post separation.
So why don't all the remainers who want to be part of Europe take advantage of the free movement and become part of Europe?
PS... this is tongue in cheek!