But the deal solves a major problem between Britain and the EU, with Brussels warning that no broader trade deal would be possible if London got away with its threat to terminate the withdrawal treaty. In 1922, the newly created United Kingdom and the Land of Bavaria concluded an agreement on the Common Travel Area (CTA). This gave British and Irish citizens the right to travel, live and work in both jurisdictions. Passport controls are not used to travel between them. The free movement provisions resulting from EU membership replaced them to some extent, but the parties kept their bilateral agreement alive when it did not have treaty status. In 2011, the British and Irish governments informally agreed to continue their joint controls upon entry of non-EEA nationals into the CTA.  On 17 October 2019, EU Heads of State and Government Boris Johnson agreed on a revised withdrawal agreement, which replaced the backstop with a new protocol.   In essence, this project would de facto keep Northern Ireland in the EU customs union and in the internal goods market (including the introduction of EU VAT), while allowing Britain to deviate. In December 2019, Labour announced that it had received an HM Treasury Paper with the Freedom of Information Act 2000, which appears to show that the Prime Minister`s draft agreement would require certain types of two-way customs checks between Britain and Northern Ireland.
 Most carriers allow passengers to travel without a passport within the common travel area, while Irish or British citizens travelling by air require photo identification and Ryanair requires all passengers to carry a passport or national identity card. [Citation required] In 2014, a private member`s bill was submitted to the Irish Parliament prohibiting carriers from prescribing a passport to travel within the common travel area, but it was not passed.  The Irish government began issuing passport cards in October 2015 corresponding to the size of national identity cards from other EU countries and accepted by all carriers, but issuing a passport card requires that the holder already have a traditional passport book.  In 2012, a pilot project was set up to call on civilian staff from the Immigration Service of the Irish Naturalisation and Immigration Service (INIS) to work with BNEB staff on immigration control at Dublin Airport. INIS staff are responsible for carrying out all in-booth tasks (including examination of arriving passengers), but do not participate in matters related to detention, detention or arrest.  On October 10, Mr Johnson and Prime Minister Leo Varadkar held „very positive and very promising“ talks, which led to the resumption of negotiations and a week later, on 17 October, Johnson and Jean-Claude Juncker announced that they had agreed on a new withdrawal agreement (subject to ratification) that replaced the backstop with a new protocol on Northern Ireland.3  In a memo from Industry Minister Richard Harrington, which was picked up by Sky News, „this [technical] idea was discussed and rejected by the UK and the EU in the summer of 2018, with both sides concluding that it would not remain an open border.