Congratulations, wonderful news for you. There is though always another side. Nephew who has lived in Africa, Australia and EU countries has decided to move back to UK permanently. Bringing his family of course. He feels the countries he has enjoyed have slowly deteriorated, high taxation, high cost of living, property expensive, health care horrendously expensive. Has noticed his family life deteriorate with longer working hours to maintain standards. EU grants can end at a whim, no guarantee and unemployment is increasing everywhere. Thought about Canada but even as a medic he would have no guarantee of work. His wife is a Prof teaching in Universities. Redundancies taking place in Canadian education. You have to look at the wider and long term picture. Your family have made decisions and may well have sooner or later made the same ones Brexit or no Brexit, you'll never know.