The UK government has published plans to get rid of parts of the post-Brexit deal it signed with the EU in 2020.
It wants to change the Northern Ireland Protocol to make it easier for some goods to flow from Great Britain to Northern Ireland.
But the EU opposes the move, saying that going back on the deal breaches international law.
The UK government disputes this, arguing that the changes will mean the United Kingdom stays together.
The alterations are set out in the Northern Ireland Protocol Bill, to be debated and voted on by Parliament.
https://www.bbc.co.uk/news/uk-politics-61790248