To get to the point of re-joining will take a long time with plenty of time for governments and minds in Europe to change.
Ultimately the EU is stronger with the UK as a member, and I’m sure if it’s willing to pay a high enough price it will be let back in (metrication, no-rebate, the euro etc).
Ultimately the EU is stronger with the UK as a member, and I’m sure if it’s willing to pay a high enough price it will be let back in (metrication, no-rebate, the euro etc).