Northern Ireland is the smallest nation in the UK, but the border with the Republic of Ireland could become one of the biggest parts of the Brexit negotiations. So why is the Irish border so important?

(Subscribe: https://bit.ly/C4_News_Subscribe)

-------

Watch more of our explainer series here - https://www.youtube.com/playlist?list...
Get more news at our site - https://www.channel4.com/news/

Follow us:
Facebook -   / channel4news  
Twitter -   / channel4news