Let me start with the obiter dictum that there is a difference between eating into time and exhausting patience. Over nine months, across both Houses, we have debated more than 1,000 non-Government amendments and hundreds of Government amendments to the Bill. Before us today are 196 Lords amendments-the outcome of hundreds of hours of debate in the other place. I beg your indulgence, Mr Speaker, in paying tribute to my ministerial team who have brought the Bill this far: my hon. Friends the Members for Wycombe (Mr Baker) and for Worcester (Mr Walker), my hon. and learned Friend the Member for South Swindon (Robert Buckland), my hon. Friend the Member for Esher and Walton (Dominic Raab) and my right hon. Friend the Member for Aylesbury (Mr Lidington); and, in the other place, Baroness Evans, the Leader of the House of Lords, and her team-Lord Callanan, Lord Keen, Baroness Goldie, Lord Duncan and Lord Bourne. I extend the same thanks to Opposition Front Benchers. It is worth at this early point remembering that the Bill has a simple, clear purpose: to ensure that the whole United Kingdom has a functioning statute book on the day we leave the European Union. That involves the considerable task of converting 40 years of EU law into United Kingdom law. This is an unprecedented task, carried out under a strict timetable. The Government respect the constitutional role that the House of Lords has played in scrutinising the Bill and, whenever possible, we have listened to sensible suggestions to improve it. However, when amendments seek to-or inadvertently-undermine the essential purpose of the Bill, which is to provide for a smooth and orderly exit, or the referendum result, we must reject them. For example, on the interpretation of Court of Justice of the European Union case law, we have worked closely with former Law Lords such as Lord Hope, Lord Judge, Lord Browne, Lord Neuberger and Lord Thomas to develop a solution that has genuinely improved the Bill. Our other Lords amendments represent the outcome of similarly productive discussions. The role of the House of Lords is clear: to scrutinise legislation that comes from this House, not to recast it or repurpose it. Of course, it should not undermine decisions that were put before the British people in manifestos or in referendums. The House of Commons' improvements to the Bill span a number of areas, ranging from narrowing the types of deficiencies that can be corrected using the delegated powers in the Bill to bolstering the rights of individuals by extending the ability to bring certain challenges under the general principles to three months after exit day. I will address in turn the main issues covered by this group on which the House of Lords has asked this House to think again but where their lordships' approach has either undermined the essential purpose of the Bill, or attempted to overrule well-considered amendments from this House. The first such area is the sifting system proposed in this House by my hon. Friend the Member for Broxbourne (Mr Walker), the Chairman of our Procedure Committee. The proposal was that a committee would consider instruments subject to the negative procedure that were brought forward under the main powers in the Bill, and could recommend that they be subject to the affirmative procedure instead. This unanimous recommendation of the cross-party Procedure Committee was clearly born out of careful and detailed consideration by that Committee, and the Government were happy to accept it. My hon. Friend's amendments were agreed by this House following an extensive debate. What we have back from the other place-Lords amendments 110 and 128-is both an imposition on our procedures by the other place and a threat to the workability of the whole process of correcting the statute book. This is for two important reasons. First, a binding recommendation following the sifting process is not a recommendation at all-it is an instruction to the Government that would mark a significant departure from established procedures for handling secondary legislation. It is equally unacceptable, as the Chair of the Procedure Committee has noted, for the opinion of a Committee of the unelected House to govern procedure in this place. The Commons Procedure Committee's proposals have teeth. As my hon. Friend the Member for Broxbourne said in December:“The political cost to my Front-Bench colleagues of going against a sifting committee recommendation would be significant. The committee will have to give a reason why it is in disagreement, the Minister will be summoned to explain his or her Department's position, and it will be flagged up on the Order Paper if a particular SI has not been agreed between the sifting committee and the Government. That will result in a significant political costâ€.- He was right. Secondly, although I understand concern about the pace at which committees will be required to operate, an extra five sitting days, as the Lords propose, would risk taking the process for a negative statutory instrument into what might well be its fifth or sixth calendar week. That would seriously jeopardise our ability to deliver a functioning statute book in time. For our part, the Government are poised to do everything we can to support the speedy work of the sifting committees. On a slightly wider point, I understand that the House of Lords wants to improve the Bill in various ways. Some of its changes can individually seem sensible and proportionate when seen in isolation, but the cumulative effect of those changes could sometimes make it impossible to deliver the smooth and orderly exit we want. I turn now to the question of exit day. After considering the issue at length, this House accepted amendments tabled by my right hon. Friend the Member for West Dorset (Sir Oliver Letwin) that set exit day in the Bill, but allowed that time to be altered in the unlikely event that the exit date under article 50 differed from that written into the Bill. That is a sensible approach. It provides certainty about our exit day, but it also incorporates the terms of article 50. Let us remember that exit day will be determined by international law rather than by this House. We discussed this issue at length when we considered the Bill that became the European Union (Notification of Withdrawal) Act 2017. Their lordships have suggested that this House abandons the conclusions of the lengthy and considered debates that we have already had on this issue by returning the Bill in broadly the same state in which it was first introduced. I accept the helpful scrutiny of the Lords on many aspects of the Bill, but this House has already reached a sensible position, which commanded a significant majority, and we propose to adhere to this House's original decision on this matter. At the heart of the Bill are the delegated powers that are essential for the United Kingdom's orderly departure from the European Union. Those powers will ensure that the statute book continues to function as we leave the European Union. As we have consistently said, we do not take the powers lightly, which was why, in addition to the changes approved by this House, we made further amendments in the Lords. When using the principal powers in the Bill, Ministers must now give their good reasons for the changes they are making, exactly as the Lords Constitution Committee recommended. We have introduced further safeguards by preventing the powers in the Bill from being used to establish public authorities. We have also removed the international obligations power from the Bill entirely, as it has become clear that there are better and more effective ways to ensure that the Government's international obligations continue to be met than through the use of that power. That means that the approach before us is substantially different from what we first introduced, while still protecting the core purpose of the Bill. This reflects the fact that the Government have listened to the views of Parliament throughout the Bill's passage, but we cannot accept Lords amendments 10, 43 and 45, which replace “appropriateâ€ as a reason for using the powers to “necessaryâ€. This House has accepted the premise of the Government's approach to delivering a functioning statute book-specifically, that we will preserve and incorporate EU law, and then make the appropriate corrections via secondary legislation. Given the scale of the task and the speed necessary, that could never have been done through primary legislation, but at every turn we have sought to ensure proper parliamentary scrutiny. Given that that fundamental premise has been supported, there needs to be sufficient flexibility for Ministers to propose changes that might not be strictly considered necessary, but that everyone here would think appropriate. “Necessaryâ€ is not a synonym for sensible, logical or proper; it means something that it is essential to do.