Other EU members don't want a neighbour that ignores air quality standards.
After Brexit, Theresa May says the UK will 'take back control of our laws'.
An eco-friendly EU withdrawal is still possible.
You might be familiar with Article 50, but Article 127 of another European treaty could be as important when it comes to Brexit.
The government is taking back control of British law with great eagerness. Here's what to look out for.
The difference between a customs union and a free trade area – explained.
The case of a man stripped of his EU citizenship offers some guidance for emigrants living in legally uncharted territory after the Brexit vote.
The European Union has a deep, and maybe unbreakable reach into our sporting life.
There is debate among lawyers on whether the process for a Brexit, once begun, can be stopped.
How does the UK go about disentangling itself from EU laws?
For many people around the world, it's a bit of a mystery.
The ruling signals part of a wider trend restricting access to welfare for EU migrants.
Few would advocate a withdrawal from the United Nations. But international law has a big impact on Britain too.
Yes, the way the EU makes its laws is complex, but it is done democratically.
UKIP leader Nigel Farage has attacked the European Arrest Warrant for putting British nationals at risk of extradition. Is he right?
Recent cases have upheld the EU's regulation and the rights of national governments to enforce it.
The home secretary is campaigning against Brexit, but with a caveat.
Reforms to where in Europe people in need of protection can claim asylum do not go far enough.
Despite a series of EU laws on waste management, some countries are still a bit rubbish.
Two academics examine the claim by Michael Gove that the deal between the UK and the EU is not legally binding.