In 1979 Khomenei flew from France where he had been in exile, to Iran as the old Shah was ousted. It was the first time in decades the news has become interesting and all that has flowed from that event should be a warning to France that people who take refuge in their borders as freedom fighters are not always the nicest or best people to help.
That aside Brexit has begun a new change in the UK. More people I have spoken to than a year ago are either thinking of taking out citizenship in the European country they have lived in for years, or migrating out of the UK. People who are married to European citizens are happy their children will be able to choose. There will be a population change.
This change will mostly be among the educated, internationally involved population and won;t include land owners who are bound by what they own but rich enough not to care either way. But the middle classes are moving and the UK will lose a large, talented group of people who would never follow Gove and Johnson into anything, anywhere at any time.