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Irish backstop

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The backstop would have required keeping Northern Ireland in some aspects of the Single Market until an alternative arrangement was agreed between the EU and the UK. The proposal also provided for the UK as a whole to have a common customs territory with the EU until a solution was delivered to avoid the need for customs controls within the UK (between Northern Ireland and Great Britain). The 'backstop' element was that the arrangement would have continued to apply potentially indefinitely unless the UK and the EU were both to agree on a different arrangement, for example on a trade agreement between UK and EU at the end of the transition period.

The Irish government and Northern Irish nationalists (favouring a united Ireland) supported the protocol, whereas Unionists (favouring the existing United Kingdom) opposed it. By early 2019, the Westminster Parliament had voted three times against ratifying the Withdrawal Agreement and thus also rejected the backstop.

In October 2019, the new Johnson government renegotiated the draft, replacing the backstop. In the new protocol, the whole of the UK comes out of the EU Customs Union as a single customs territory. Northern Ireland will be included in any future UK trade deals, but will have no tariffs or restrictions on goods crossing the Irish border in either direction, thereby creating a de facto customs border down the Irish Sea with Great Britain. There is also a unilateral exit mechanism by which the Northern Ireland Assembly can choose to leave the protocol via a simple majority vote. This new protocol has been dubbed by some as "Chequers for Northern Ireland", due to its similarity with the UK-wide Chequers future relationship plan proposed by Theresa May, which had previously been rejected by the EU and criticised by Johnson.

Context

Political context

The Northern Irish border will be the only land border between the European Union and the United Kingdom after Brexit. Its 500 km (310 mi) length, 300 crossings and lack of significant geographic barriers make it difficult to control.

In February 1923, shortly after the creation of the Irish Free State, a Common Travel Area (CTA) consisting of the newly founded state and the United Kingdom was informally agreed, in which each side would enforce the other's external immigration decisions, thus avoiding the need for immigration controls between the two countries. This tradition has been continued so that (as of September 2019) Irish citizens are entitled to settle, work and vote in the UK, with British citizens in Ireland having similar rights.

The Northern Ireland conflict broke out in 1969 and involved the deployment of the British army under Operation Banner carrying out security checks, closing over 100 border crossings and constructing observation infrastructure across Northern Ireland; these measures began to be reverted following IRA ceasefires in 1994 and 1997.

The completion of the European Single Market in 1992 (initiated by European Commissioner Lord Cockfield) and the Good Friday Agreement (brokered by Irish-American Senator Mitchell) in 1998 were seen as making it possible to dismantle what had previously been extensive border infrastructure between Northern Ireland and the Republic of Ireland.

On 29 March 2017, Prime Minister Theresa May commenced the two-year Brexit negotiation process by serving notice under Article 50 of the EU Treaty. In response, the remaining EU countries (EU27) published their "phased" negotiation strategy which postponed any negotiations on the future relationship with the UK (the non-binding "Political Declaration"), until a binding withdrawal agreement had been concluded, covering:

  • Agreement on the so-called "divorce bill";
  • Agreement on rights of EU citizens living in the UK;
  • Agreement on the border between Northern Ireland and the Republic within the withdrawal phase.

Economic context

The Republic of Ireland has, after Luxembourg, the second-highest gross domestic product per capita in the EU, thanks to a favorable corporate tax system, and its membership of the European Single Market. Approximately 85% of Irish global freight exports pass through ports in the United Kingdom, about half of which are destined to the UK, while half continue to the EU via Dover and Calais. Using the UK as a "land bridge" is rapid (taking 10.5 hours for the route Dublin-Holyhead-Dover-Calais) but could be compromised by customs checks in Wales and Calais in a no-deal Brexit. This is because, in the absence of a trade agreement, the goods trade relationship between the UK and the EU (including the Republic) would revert to World Trade Organization (WTO) membership terms. These stipulate that the same customs tariffs and checks must be indiscriminately applied between all WTO members (Most Favoured Nation criterion), unless specific members have a trade agreement. This principle would also apply to trade across the land border in Ireland in the absence of a trade agreement.

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