Peers Challenge Mahmood’s Migration Plans Over Potential Legal Issues

Key Points

• A House of Lords committee has warned that Home Secretary Shabana Mahmood’s plan to double the qualifying period for indefinite leave to remain (ILR) is “manifestly unfair” and could be unlawful.
• The proposal would extend the wait for ILR from five years to 10 years for most migrant workers.
• The change would apply retrospectively to migrants already living and working in the UK.
• Up to 100 Labour MPs, including Angela Rayner, have reportedly pushed back against the plan, calling it “unfair” and “un-British”.
• Andy Burnham raised concerns when the plan was first announced in November and has not yet clarified his current position.
• The Lords’ justice and home affairs committee said the rule change could harm the UK’s reputation among highly skilled migrants.
• The Home Office has defended the plan, citing the cost of an estimated 1.2 million migrants who could become eligible for ILR within three years.
• Shabana Mahmood is reportedly prepared to proceed, with possible concessions for high earners and public sector workers such as doctors, nurses and teachers.
• Senior peers on the committee include Lord Dubs, Lord Hogan-Howe and Lord Anderson.
• Madeleine Sumption of Oxford University’s Migration Observatory warned the changes could damage the UK’s standing as a reliable destination for migrants.
• The Lords constitution committee said the rule of law requires legislation to be prospective, not retrospective.
• Home Office minister Mike Tapp told the Lords that legal advice supported the retrospective approach, with impact assessments to follow.

Westminster (Britain Today News) June 23, 2026 – The warning, delivered by the Lords’ justice and home affairs committee, represents one of the most direct challenges yet to the Home Secretary’s proposal to extend the qualifying period for indefinite leave to remain (ILR) from five years to 10 years for most migrant workers. The committee has also cautioned that the policy could damage the UK’s reputation as a destination for highly skilled migrants, adding fresh weight to a rebellion that has already drawn in senior figures from within the governing Labour Party.

At the centre of the dispute is the question of retrospective application. The proposed change would not only affect future applicants but would also apply to migrants who are already living and working in the UK, many of whom built their lives around the existing five-year rule. That detail has triggered a backlash from as many as 100 Labour MPs, including Angela Rayner, who has called the move “unfair” and “un-British”. Andy Burnham, the former mayor of Greater Manchester, also voiced concerns when Mahmood’s plans were first announced in November.

What Exactly Is Shabana Mahmood Proposing?

Shabana Mahmood, the Home Secretary, wants to double the amount of time most migrant workers must spend in the UK before they can apply for indefinite leave to remain, raising the threshold from five years to 10 years. Indefinite leave to remain is the immigration status that allows a person to live, work and settle in the UK permanently, without the time restrictions or conditions attached to a visa. It is also typically a stepping stone towards British citizenship.

The proposal would apply to most migrant workers, although the Home Office has signalled that concessions could be made for specific groups. It is understood that Mahmood is prepared to proceed with the plan, although there may be reductions to the extended wait for high earners and those employed in public services, including doctors, teachers and nurses.

Why Does the Lords Committee Say the Plan Could Be Unlawful?

The Lords’ justice and home affairs committee focused much of its criticism on the retrospective nature of the proposal. In its report, the committee said:

“Any retrospective change would be manifestly unfair – and may be unlawful – towards migrants, who have planned their lives around the current system and made significant long-term decisions, such as career, housing and family life decisions with the expectation that they would be able to qualify for ILR under the current rules.”

The committee went further, warning of consequences beyond the immediate group of migrants affected. It said:

“The UK’s reputation would be adversely impacted by retrospective action, which will likely make the UK a less attractive destination for highly skilled migrants in the future. Any changes to ILR rules should not apply retrospectively to individuals who are already on a qualifying route.”

The committee also addressed the argument that the current rules were set under a previous administration, stating:

“While the Government may not support the previous government’s decision to open certain visa routes, that decision has already been made. Many migrants made significant long-term decisions with the expectation of acquiring ILR after five years.”

Why Is the Retrospective Element So Controversial?

The retrospective nature of the policy is the single most contentious aspect of the proposal, both legally and politically. Migrants who entered the UK under the existing five-year framework had no reason to expect that the rules would change after they had already begun the process of qualifying for ILR. The Lords committee’s report noted that individuals who submitted written evidence described having left family behind, quit jobs, sold homes, taken out loans and postponed having children in order to relocate to the UK on the understanding that they would qualify for permanent settlement after five years.

This argument forms the basis of the committee’s concern about fairness, but it also underpins a separate warning from the Lords constitution committee regarding the rule of law. That committee stated that

“the rule of law requires laws to be prospective, rather than retrospective”,

adding that legislation

“should apply only to later behaviour and situations and not to those which predate it.”

How Has the Home Office Defended the Proposal?

The Home Office has defended the plan primarily on financial grounds, pointing to the scale of the population that could be affected. Officials have cited concerns about the potential multi-billion-pound cost associated with an estimated 1.2 million migrants — sometimes referred to as the “Boriswave” cohort, a reference to the surge in visa approvals during the Boris Johnson premiership — who may become eligible for ILR over the next three years.

This financial argument is central to the government’s justification for extending the qualifying period, with ministers framing the change as a way of managing the fiscal impact of large numbers of people transitioning to permanent settlement status, and the accompanying entitlements that come with it, within a compressed timeframe.

What Has Mike Tapp Said About the Legal Risk?

Mike Tapp, a Home Office minister, addressed the legal concerns directly when speaking to the House of Lords. He told peers that the Home Office had been receiving legal advice on the matter and was satisfied that the proposed retrospective action was lawful. Tapp indicated that impact assessments examining the consequences of the policy would be published “in due course”, though no firm date was given for their release.

This assurance from Tapp stands in direct contrast to the conclusions reached by both the justice and home affairs committee and the constitution committee, setting up a dispute between the government’s internal legal position and the view of senior parliamentarians scrutinising the policy.

Who Sits on the Lords Committee Raising These Concerns?

The justice and home affairs committee that produced the report includes several senior and experienced peers. Its members include Lord Dubs, a Labour peer and long-standing campaigner for refugee rights. Also on the committee is Lord Hogan-Howe, the former Metropolitan Police Commissioner, who has separately been appointed by Mahmood to lead a review into reducing the number of police forces in England and Wales. The committee also includes Lord Anderson, a former independent reviewer of terrorism legislation who previously conducted a review of the Prevent counter-extremism programme for the Labour government.

The presence of figures such as Hogan-Howe, who holds a separate official role under Mahmood’s own department, adds a notable dimension to the committee’s criticism of her flagship migration proposal.

What Impact Could This Have on the UK’s Ability to Attract Skilled Migrants?

Beyond the immediate legal and political questions, the Lords committee raised a broader concern about the UK’s long-term competitiveness in attracting skilled workers from abroad. Madeleine Sumption, the head of Oxford University’s Migration Observatory, offered a similarly cautionary assessment. She warned:

“The UK might be seen as an unreliable place to be a migrant, and in the future that could have a knock-on effect on attracting people who the UK wants to attract.”

Sumption’s comments echo the committee’s own warning that retrospective rule changes risk sending a signal to prospective migrants that the UK’s immigration system cannot be relied upon, even when individuals have followed the rules as they existed at the time they arrived.

Could Migrants Mount Legal Challenges Against the Rule Change?

Legal experts have also raised the prospect of formal challenges should the government proceed with applying the new rules retrospectively. The core of any such challenge would likely rest on the same principle highlighted by the Lords constitution committee: that changing the terms of a long-term immigration pathway after individuals have already begun that process, and made significant life decisions on the basis of the existing rules, could fall foul of fundamental legal protections around fairness and predictability in law.

While the Home Office, through Mike Tapp, has expressed confidence in the legality of its approach, the committee’s report suggests that any move to implement the policy without amendment is likely to face continued legal and political resistance.
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Where Does Andy Burnham Stand on the Proposal Now?

Andy Burnham’s position is being closely watched, given his prominence within the Labour Party. Last November, while serving as mayor of Greater Manchester, Burnham said the policy would leave people “in a sense of limbo and unable to integrate”, and indicated he would prefer to retain the existing five-year wait for ILR rather than extend it.

Burnham has not yet stated where he currently stands on the issue. His position takes on added significance given that he is now regarded as the favourite to become the next Prime Minister, following his by-election victory last week. Should Burnham move into a position of greater influence over government policy, his previously stated reservations about the ILR changes could become a significant factor in how the proposal ultimately progresses.

What Happens Next for the Government’s ILR Proposal?

The Lords committee’s verdict is likely to add further momentum to the backbench rebellion already forming around the policy, with up to 100 Labour MPs understood to have expressed opposition to its retrospective application. Shabana Mahmood is reported to be ready to press ahead with the plan regardless, though the suggestion of possible concessions for high earners and key public sector workers indicates that some flexibility may be introduced before the policy is finalised.

With legal warnings from two separate Lords committees, sustained internal party opposition, and unresolved questions over the policy’s financial and reputational consequences, the government faces a difficult balancing act between its stated aim of controlling the costs associated with ILR eligibility and the fairness concerns raised by peers, legal experts and migrants themselves. The publication of the promised impact assessments is likely to be a key moment in determining how the debate develops in the weeks ahead.