Europe's bitter dispute with Britain over post-Brexit trade rules for Northern Ireland are expected to Prime Minister Boris Johnson's G7 summit.
The meeting came at the start of Biden's first foreign tour as president that includes NATO, the EU and talks with Russia's Vladimir Putin.
Long ignored by politicians in London, violence in one of Britain's most combustible regions rears its head and endangers a fragile peace.
EU objects to Britain unilaterally extending a grace period beyond April 1 for trade checks on goods the UK sends to Northern Ireland, which under Brexit is subject to the bloc’s trade regulations.
The EU also abruptly reversed course on a plan to use emergency Brexit measures to restrict exports of vaccines through the Irish border to the United Kingdom after it sent shockwaves through Belfast, London and Dublin.
This is what brought Sinn Fein to victory in the Irish polls.
Hard work of building new economic ties between EU and its ex-member begins as Britain formally leaves economic bloc after 47 years of membership.
Britain leaves the European Union today and starts work to rewrite its relationship with the bloc. Britain joined what was then called the European Economic Community on January 1, 1973, and voted out on June 23, 2016 in a referendum by the Tories.
The UK Parliament took a historic step in approving the terms for leaving the EU on January 31 after years of upheaval.
A 1998 peace accord that ended three decades of violence over British rule of Northern Ireland in which thousands died requires the two main parties to share power.
Catholic separatist Irish Republicans, Protestant Irish unionists and loyalists to the British government have been gravely worried about the impact of imminent Brexit.
During the debate, Johnson ridiculed Corbyn's support for a new referendum while the Labour leader said the prime minister's pledge to "get Brexit done" actually meant seven years of trade talks.
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