When the UK was in the European Union, it helped set the rules of the EU single market. Scotland, Wales and Northern Ireland followed these rules too.
With Brexit, the UK and devolved governments agreed to replace some EU rules with UK rules.
How has this process affected the relationship between the UK and devolved governments?
A new animation from the Centre on Constitutional Change explains the impact of Brexit on devolution.
Watch: Brexit and devolution
Click the icon in the bottom right of the video to watch full screen, or watch on YouTube.