All three of them have committed to joining it and two of them already peg their currency to the euro. Bulgaria have already designed their 1 Euro coin. It's very unlikely Scotland could keep the pound and stay in the EU continuously, although I expect there would be large amounts of latitude given to iScotland wrt joining.The last 3 countries to join the EU were Croatia (2013), Bulgaria & Romania (both 2007). None of them have the Euro as their currency.
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