The U.K. already has one international border — where Northern Ireland meets the Republic of Ireland — but Great Britain (the island consisting of just England, Scotland and Wales) hasn’t ...

A truck returning from Northern Ireland is stopped at the border by Irish Free State customs officers (1925) Businesses and communities in border regions immediately felt the impact.

In Northern Ireland, Brexit is once again raising difficult questions of identity: Catholic vs. Protestant, Irish vs. British, nationalist vs. unionist.

Concerns over the possible return of a hard Irish border have rarely been out of the news since the Brexit vote. From the Brexit backstop, to the Northern Ireland Protocol, to the current Windsor ...