Video Duration 02 minutes 53 seconds

No-deal Brexit threatens key Ireland border

Failure to reach Brexit deal could cause new territorial dispute between Northern Ireland and the Republic of Ireland.

For the past 20 years, the border between Northern Ireland – a part of the United Kingdom – and the Republic of Ireland has been open.

Both sides have benefitted economically as members of the European Union, but there are fears that a no-deal Brexit might turn back the clock.

Al Jazeera’s Neave Barker reports from Carlingford Lough on the border between the two countries, which could soon be subject to a new territorial dispute.