I would need to know what rejoin looked like - that was the problem with Brexit, there were so many different Brexits possible. Now it is not clear what rejoin looks like - we are unlikely to be able to have what we had before. The Euro is a red line for me - not because I have any issues with the currency of particular attachment to the pound, it is the loss of a central bank and the degrees of freedom that offers that worries me - so I answered don't know as it depends...