My Lords, these are meant to be helpful amendments and, if they are read with a favourable eye, they might be seen as such. To start, I remind your Lordships that freedom from executive detention is the most fundamental right of all. It is not only an international human right but a national one, reaching back 800 years to the Magna Carta. In the absence of any statutory time limit on the length of detention, other than for children and pregnant women, the right to liberty has been safeguarded in our common law.

Amendments to strip back Section 12 and uphold the common law during the passage of the Illegal Migration Bill in July 2023 were supported from all corners of this House by a quite motley crew of very noble Lords. Amendment 28 and the consequential changes made by Amendment 30 seek to simply restore the common law to the position it was in before Section 12 of the Illegal Migration Act 2023 was brought into force and sought to chip away at it. With so many other provisions of the Illegal Migration Act to be repealed by Clauses 38 and 39, Section 12 should be added to their number.

There are two reasons. First, the reasonableness of a period of immigration detention should not simply be in the hands of the Minister and down to her opinion; it should be entrusted to the responsibility of our courts in our world-renowned common-law system. This is not to say that courts will ignore the Home Secretary’s views. On the contrary, in 2007 our Court of Appeal specifically acknowledged that it will no doubt take account of the Home Secretary’s views as may seem proper.

Secondly, by returning to the common-law position, we would also uphold the right to liberty under international human rights law. In 2016 the European Court of Human Rights agreed that it is this consideration by domestic courts of the reasonableness of each individual period of detention that ensures the absence of a general fixed time limit in the UK system, because it does not, in principle, give rise to increased risk of arbitrariness.

Repealing Section 12 of the Illegal Migration Act is consistent with the recommendations of the Joint Committee on Human Rights. At paragraph 103 of its report on this Bill, it clearly stated:

“We agree with our predecessor Committee and recommend the repeal of section 12 to restore certainty and ensure compliance with Article 5”.

Turning to Amendment 32 in my name, I take forward the task of continuing to recommend that the Government leave out the retrospective element of the detention power in Clause 41—that is, the power to detain people when considering whether to make a deportation order on the basis of their presence. This amendment is modest when compared with the recommendation of the Joint Committee on Human Rights, which was to leave Clause 41 out of the Bill altogether. This amendment is simply about removing retrospectivity in subsection 17, which treats the new detention power as always having had effect.

The Government’s position appears to be that Clause 41 is necessary to clarify matters but that it is not retrospective. Both cannot be true. It is either necessary because it is retrospective and protects the Government from false imprisonment challenges, or it is unnecessary because it is already the position in law. The Government’s own impact assessment, when read carefully, shows that it has been unlawful since 20 October 2014 to detain people in the way that they have. Changing the law now and treating it as if it had always had effect will provide neither legal certainty nor foreseeability to people detained in these past 11 years. It only insulates the Government from challenge and inhibits people from having a domestic remedy and compensation for their unlawful detention.

This precedent of making the unlawful deprivation of liberty lawful places us on a very slippery slope. I ask the Government to reconsider their position on both these amendments, to repeal a section of the law that prior Governments passed in the Illegal Migration Act to erode our common law, and to leave out retrospectivity from their new detention order—all to uphold the right to liberty and to be free from executive detention, that most fundamental right of all. I beg to move.