What is the Irish backstop, and why has it complicated Brexit?
Republic of Ireland–United Kingdom border - Wikipedia
Irish border: New UK travel rules nonsensical, says Stephen Farry - BBC News
On the Irish border, people fear Brexit will bring back the bad old days | Ireland | The Guardian
Brexit, Border Controls and Free Movement - BrexitLawNI
The Irish border and Brexit - Full Fact
Will there soon be border guards in Ireland again? | eurotopics.net
Ireland Border Issue Proves Major Brexit Hurdle - DER SPIEGEL
Brexit: Irish Sea border checks 'not fit for purpose' - BBC News
Explained: What is the Northern Ireland Protocol? | Euronews
Britain to establish post-Brexit immigration controls on Ireland borders
Juncker: No-deal Brexit means Irish border checks – DW – 09/22/2019
Irish border control changes. A general view of passport control at Dublin Airport Stock Photo - Alamy
GB produce entering NI 'to get extended grace period on border checks'
Ireland border control hi-res stock photography and images - Alamy
UK publishes legislation on border control posts
Northern Ireland halts border checks after threats – DW – 02/02/2021
No special deal possible to stop the return of Border controls – The Irish Times
UK and EU edge closer to deal on Brexit checks in Northern Ireland | Brexit | The Guardian
Dublin: row over British border controls regulation | eurotopics.net
Irish border controls expected to return
10 Facts You Never Knew About The Border In Ireland | Ireland Before You Die
A customs border between North and South? What we can learn from Ireland in 1923
Brexit border controls disrupt Northern Ireland business, provoke pro-British backlash - Marketplace
Irish border: the invisible frontier | New Internationalist
