Britain’s Foreign Secretary Liz Truss has warned the European Union that she is prepared to unilaterally override parts of the post-Brexit agreement on Northern Ireland if the negotiations fail. Truss was handed responsibility for the negotiations after Lord Frost resigned as Brexit minister last month. She will hold her first face-to-face talks with her EU counterpart, European Commission Vice-President Maros Sefcovic, when he visits the UK on Thursday. Writing in The Sunday Telegraph, Truss said she will suggest “constructive proposals” to Sefcovic, but if a deal cannot be struck, she will be “willing” to trigger Article 16 of the Northern Ireland protocol, which would suspend parts of the treaty designed to prevent a hard border between Northern Ireland and the Republic of Ireland. She said it is her “absolute priority” to resolve the “unintended consequences” created by the protocol to maintain peace in Northern Ireland. Truss said she “will not …