The Republic of Ireland–United Kingdom border, sometimes referred to as the Irish border or British–Irish border, runs for 499 km from Lough Foyle in the north-west of Ireland to Carlingford Lough in
The border at Killeen (viewed from the UK side) marked only by a metric (km/h) speed limit sign
The border on the Lenamore Road, County Londonderry, Northern Ireland. The Republic of Ireland begins just in front of the speed signs and lies to the north of Northern Ireland at this location.
A Sinn Féin protest against a hard border. Post-Brexit border controls are a controversial issue.
A bilingual traffic sign in County Louth, in the Republic of Ireland, warning drivers travelling south across the border that metric speed limits are used in ROI, whereas the UK uses imperial units in driving
Partition of Ireland
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The Partition of Ireland was the process by which the government of the United Kingdom of Great Britain and Ireland divided Ireland into two self-governing polities: Northern Ireland and Southern Irel
Republic of Ireland–United Kingdom border
…for the whole island of Ireland on 6 December 1922. The border became an international frontier after the Parliament of Northern Ireland exercised its right to opt out of the Free State on 7 December 1922. The partition of 1921 created only a provisional boundary; a Boundary Commission met in 1924–25 to fix a permanent border between…
Ulster Volunteers marching in Belfast, 1914
Catholic-owned businesses destroyed by loyalists in Lisburn, August 1920
Crowds in Belfast for the state opening of the Northern Ireland Parliament on 22 June 1921
Members of the Irish negotiation committee returning to Ireland in December 1921