Originally Posted by
Kalis
The Northern Irish are entitled to Irish passports anyway and Ireland is not in the Schengen Area, so it would make no difference to the mainland EU, as they can check passports on entry from Ireland - you clearly don't know any of this, so do not try and pretend you do - and British people in Ireland would have the same issues of not being able to work, claim benefits, or sell goods legally.
Why would mainland British people not just go to continental Europe by ferry, plane or tunnel anyway? It would be far easier than a circuitous journey through Norn Iron.