The UK's proposed reforms to settlement are often presented as a debate about numbers: should the qualifying period for indefinite leave to remain remain five years, become ten years, or potentially be longer for some migrants?
But beneath that debate lies a more fundamental question:
What happens when migrants make life-changing decisions based on the immigration framework in place when they come to the UK, only to find that the rules governing their route to settlement have subsequently changed?
I have a particular reason for taking an interest in this question.
As Executive Director of HSMP Forum, I led campaigns and judicial review challenges against retrospective changes to the immigration arrangements affecting highly skilled migrants in the UK. Although the Highly Skilled Migrant Programme itself has long since been replaced, the legal issues raised by those challenges remain relevant to today's debate.
The circumstances are different, and the earlier judgments do not provide an automatic answer to the legality of today's proposals. But they provide an important historical example of what can happen when immigration policy changes after migrants have already entered the country and organised their lives around the existing framework.
The settlement landscape is changing
For many years, the structure of UK economic migration was relatively predictable.
A migrant would enter under a temporary route, satisfy the relevant requirements, extend their permission where necessary and, after completing the prescribed period of lawful residence, potentially qualify for indefinite leave to remain (ILR).
For many routes, five years became the familiar horizon.
This was never an unconditional guarantee of settlement. Applicants still had to satisfy the relevant requirements, including residence, English-language, Life in the UK and suitability requirements where applicable.
But a defined route towards settlement allowed people to make long-term decisions: bringing family members to the UK, buying a home, establishing a business, investing in professional qualifications or putting down roots in a particular community.
The Government's proposed "earned settlement" model could substantially alter that landscape.
The consultation proposed a baseline qualifying period of ten years for most migrants, with the period potentially being reduced or increased depending on factors including contribution and integration. It also proposed a significantly longer starting point for some categories, including recognised refugees under the new protection model.
The proposals also raise the possibility of applying the new framework to people already in the UK who have not yet obtained settlement.
That is where the debate becomes more than a discussion about immigration policy.
It becomes a question of legal certainty and fairness.
What happened with HSMP?
The Highly Skilled Migrant Programme was introduced in 2002 to attract highly skilled individuals to the UK without necessarily requiring a specific job offer.
The programme subsequently underwent significant changes. In April 2006, the settlement qualifying period was increased from four years to five years. Further changes followed later in 2006, including changes affecting extensions and settlement.
The controversy arose because the new arrangements were applied to people who had already entered the UK under the previous framework.
HSMP Forum, which represented affected migrants, challenged the retrospective application of those changes through judicial review.
In R (HSMP Forum Ltd) v Secretary of State for the Home Department [2008] EWHC 664 (Admin), the High Court found that the Government had acted unlawfully in applying the November 2006 changes to people who had already been admitted under the previous scheme.
The court considered the representations made to migrants when they entered the programme and the circumstances in which they had made decisions to come to the UK. It recognised the importance of the expectations created by the scheme and found that the failure to honour those expectations gave rise to serious unfairness.
The litigation did not end there. A further challenge concerned the increase in the settlement qualifying period from four to five years. Subsequent legal and policy developments resulted in eligible migrants who had entered the HSMP before the relevant 2006 changes being able to qualify for settlement under the earlier four-year framework.
The significance of the episode extends beyond the HSMP itself.
It demonstrated that the length of a settlement qualifying period can become a question of legal fairness when it is changed after migrants have already embarked upon the route.
The past does not automatically determine the present
It would be wrong to suggest that the HSMP judgments mean that the Government cannot now change settlement requirements.
Immigration Rules can and do change. Governments must retain the ability to respond to economic conditions, labour-market requirements, public policy and wider social circumstances.
Nor does every migrant have an absolute legal right to the immigration rules remaining unchanged throughout their residence.
The current proposals must therefore be considered on their own legal footing.
The important question is more nuanced:
When the Government changes the Rules, what obligations of fairness arise towards people who have already entered the immigration system under the previous framework?
That is where concepts such as legitimate expectation, retrospectivity and legal certainty become relevant.
The HSMP experience does not provide a ready-made legal answer. It does, however, provide a useful historical example of how these principles can become important when Government policy changes affect people who have already relied upon the previous framework.
What should happen to migrants already on the pathway?
The Government's consultation recognised the difficulty of dealing with people already in the UK and sought views on transitional arrangements for migrants already on a pathway to settlement.
This matters because the difference between a five-year and ten-year route is not simply an additional five years on a spreadsheet.
Consider a migrant who arrived in the UK in 2022 on a route leading, under the rules applicable to them, towards settlement after five years. They may have changed employment, brought their family to the UK, purchased a property, started a business or made other long-term commitments on the assumption that settlement was approaching.
If the qualifying period is subsequently extended substantially, the consequences can affect family planning, housing, careers, finances and citizenship plans.
A future migrant can decide whether to enter the UK under a ten-year settlement framework. Someone who has already spent several years here under a different pathway made that decision under materially different circumstances. That distinction deserves serious consideration when transitional arrangements are designed.
Imagine, for a moment, that British citizens living abroad faced the same situation. They had moved to another country under rules providing a five-year route to permanent residence. After four years of residence, having built careers, homes and families there, the government announced that the qualifying period would become ten years — and that the new rules would apply to them too. Would we regard that as simply an ordinary change of immigration policy, or would we instinctively ask whether those already on the pathway should receive some form of transitional protection?
The comparison is not intended to suggest that the legal systems or rights involved are identical. It illustrates a more fundamental question of fairness: should migrants who have already committed themselves to a country under one settlement framework be required to meet substantially longer requirements introduced after they began that journey?
In my view, this is where transitional protection becomes particularly important. Migrants who have already entered the UK under a defined route to settlement should not simply be treated as though they arrived after the rules changed. At a minimum, transitional arrangements should recognise the position of those who have already spent several years working towards settlement under the previous framework.
The importance of legal certainty
This is where the concept of legitimate expectation becomes particularly interesting.
Legitimate expectation does not mean that every Government statement becomes an irrevocable legal right. Nor does it prevent Parliament or the executive from changing policy.
But where public authorities have made clear representations and individuals have relied upon them, the circumstances in which those representations can subsequently be withdrawn may become a matter for public law.
The HSMP litigation is an example of the courts examining precisely that type of issue.
The lesson should not be overstated. Today's settlement proposals arise within a different statutory and policy context.
Nevertheless, the earlier experience suggests that the manner in which immigration reform is applied to existing migrants can be as important as the substance of the reform itself.
What should migrants do now?
The first point is to distinguish between current law and proposed reform.
The earned settlement proposals should not be treated as though they are already part of the Immigration Rules. The Government has been considering consultation responses, and further changes will need to be introduced through the appropriate legal mechanisms.
At the same time, uncertainty about future reforms should not lead migrants to ignore their current position.
Anyone approaching settlement should understand:
- the immigration routes they have held;
- whether their current route leads to settlement;
- the qualifying period that currently applies;
- their residence and absence position;
- the applicable English-language and Life in the UK requirements; and
- whether an alternative route could provide greater certainty.
For people who have already spent several years in the UK, professional advice may be particularly valuable where there is uncertainty about the interaction between existing rights, future applications and proposed reforms.
The lesson from HSMP
The HSMP experience does not tell us exactly what the final settlement reforms will look like. Nor does it establish that every future change affecting existing migrants would be unlawful.
Its importance lies elsewhere.
Migrants are not simply entries in an immigration statistics table. They are people who make decisions based on the legal framework presented to them.
They move countries. They leave jobs. They bring children. They buy homes. They establish businesses. They pay taxes. They build professional and personal relationships.
When the rules change, those decisions do not simply disappear.
The Government must retain the ability to change immigration policy. But the history of judicial reviews demonstrates that fairness, representations, legitimate expectations and good administration can become important considerations when those changes affect people who have already relied upon the previous framework.
That is perhaps the most important lesson from the HSMP experience for the current settlement debate.
Conclusion
The debate about earned settlement is ultimately about more than whether ILR should take five, ten or fifteen years.
It is about the relationship between Government policy and the expectations created by that policy.
A migrant who enters the UK on a temporary visa does not necessarily have a guaranteed right to settle. But where the immigration system establishes a defined route towards permanence, it is reasonable to ask what safeguards should apply when that route is substantially altered for people who are already travelling along it.
The Government is entitled to change immigration policy.
The more difficult question is how that change should be implemented.
The experience of HSMP Forum almost two decades ago demonstrates that retrospective immigration policy can raise serious questions of fairness and legality, and that those questions can ultimately reach the courts.
The current reforms will have to be judged on their own legal footing.
But as the UK moves towards an immigration system in which settlement is increasingly described as something to be earned rather than a defined destination after a prescribed period, one principle deserves particular attention:
Changing the rules for future migrants is one thing. Changing the destination for people who have already begun the journey is another.
The way the Government addresses that distinction — particularly through transitional arrangements — may prove to be one of the most important aspects of the next stage of UK immigration reform.