I am trying to understand this. The UK, Australia, New Zealand, Canada and some others have the same head of state, Queen Elizabeth. People who live in these countries do not move freely between them. However, we can move to and from the UK and any EU country without sharing the same head of state. Would it not be sensible to have free movement of people with citizenship of countries with the same head of state? I ask this selfishly because I would like to live in New Zealand but I don't qualify. I've tried every avenue. I can't understand how things have been arranged between countries.