@Walter Hinteler,
I'm confident that people on both sides of the channel will be taking actions to protect their own interests in this change. The transition is exactly that - a short -term adjustment to a changed situation. That, however, doesn't have to mean that they represent opposing sides or conflicting interests in what lies ahead for Europe.
Britain has chosen to separate itself from EU governance, following a fairly long, and sometimes hesitant, process of joining it. From an historical perspective there are important, and, perhaps still meaningful, reasons behind all that. I doesn't, and shouldn't, mean the end of mutually cooperative relations among neighboring states that still share many common interests.
Brexit doesn't require either resentment or hostility on either side (though both may occur). I hope that the cooperative spirit that enabled the creation of the various stages of the European Union will persist and these European neighbors will find a way to live together harmoniously.