Given that some states are being asked to increase their presence in border and remote areas, free trade and free movement of goods and people could become a real cause for concern.
What is Boris Johnson's Brexit plan?
How man-made barriers can harm humanity for centuries.
The Brexit agreement between the UK and Ireland that few people are talking about – and why it's still not enough.
The government has abandoned its plan to charge £65 for EU citizens applying for 'settled status' after Brexit – but what does it secure.
Like Lewis Carroll's nonsense poem, the Brexit target was a figment of everyone's imagination.