There would be a negotiation (regarding e.g. the UK contribution and rebate), yes. Citizenship and self-determination are absolute fundamentals of the EU. I un

There would be a negotiation (regarding e.g. the UK contribution and rebate), yes. Citizenship and self-determination are absolute fundamentals of the EU. I understand why there is pressure - particularly from Spain - to obfuscate this, but I very much doubt that the EU would be constitutionally able or willing to force a new country to jump through the hoops of rejoining.