Until we know the EU's closing position in response to the UK's final, ( final ), proposals for a settlement, NOBODY can predict what effect there might be on the economy. The Leaver Republican Guard banner wavers may be proved correct and all remainer arguments shown to be no more than Private Fraser's Cassandran doom-mongering. Then again, it could all just dissolve into a huge sh!tstorm of financial meltdown such as hasn't been seen since the Weimar Republic. Quite likely it may just be relatively plain sailing into a sensibly implemented new pan-European operating partnership.