BRUSSELS, Belgium (AFP) — The EU backtracked Friday over threats to restrict vaccine exports to Northern Ireland after London voiced “grave concerns” over the proposed move. A furious row over shortages of AstraZeneca’s Covid-19 vaccine has risked stoking conflict with the UK just weeks after London and Brussels sealed a Brexit trade agreement. The EU had warned it would invoke Article 16 — overriding part of a deal with London allowing the free-flow of […]