The border is only 96 miles long. Building a nice big wall to keep out the illegal immigrant wave of rapefugees trying to get into England and Wales shouldn’t be too costly.
There is no way Scotland can afford to pay for their own welfare state much less a wave of rapefugees. They should take that into account before risking their own Exit vote.
"OK....but what's the price if you build two walls?"
What if Merkel naturalizes all the rapefugees in Germany? Under EU rules those muzzies can then freely emigrate to Britain. Bad news.