14 October: Parliament returns for the Queen's Speech. 17 October: The UK and European Commission agree on a revised withdrawal agreement containing a new protocol on Northern Ireland. The European Council endorses the deal. 19 October: A special Saturday sitting of Parliament is held to debate the revised withdrawal agreement. The prime minister moves approval of that agreement. MPs first pass, by 322 to 306, Sir Oliver Letwin's amendment to the motion, delaying consideration of the agreement until the legislation to implement it has been passed; the motion is then carried as amended, implementing Letwin's delay. This delay activates the Benn Act, requiring the prime minister immediately to write to the European Council with a request for an extension of withdrawal until 31 January 2020. 19 October: Prime minister Boris Johnson sends two letters to the president of the European Council, Donald Tusk: one, which is stated to be from the UK prime minister but is not signed, refers to the requirements of the Benn Act and requests an extension until 31 January 2020; the other, signed personally by Johnson and copied to all Council members, states that it is his own belief that a delay would be a mistake and requests support from the president and Council members for his continuing efforts to ensure withdrawal without an extension. The letters are delivered by the British permanent representative in Brussels, together with a cover note signed by himself which affirms that the first letter complies with the Benn Act. 21 October: The Speaker refuses the government's request for a new vote on the withdrawal proposal, applying the convention that a motion that is the same "in substance" as an earlier one cannot be brought back during the course of a single parliamentary session. 21 October: In the Inner House of the Court of Session, the petitioners concede that Johnson has fulfilled the requirement of the Benn Act that he write seeking an extension, but contend that his second letter negates the first. The Court refuses the government's request to dismiss the case, deciding that the case should remain before the court "until it is clear that the obligations under [the Benn Act] have been complied with in full". On 7 October, government lawyers had undertaken to the Outer House that Johnson would abide by all requirements of the Act, one of which is to respond to the EU's reaction to