It isn't a matter if Brexit will work, it's a matter how well it will work. With the "City" crowd shopping for new domiciles and quite possibly moving, the prospects are not so good. What will the Brits sell? are the Scots and Northern Irish staying in? Would you buy a Jaguar or a Rover?

As far as security goes; the Brits have for too long believed that their insular existence — in more than one way — will provide extra security.