Starting on November 11, 2025, the United Kingdom has enacted a significant reform to its immigration system, replacing the former Part 9 (Grounds for Refusal) of the Immigration Rules with a new, consolidated framework called Part Suitability. This change applies across almost all visa routes, including work, study, and family categories, unifying the rules for refusal and cancellation of permission.
The most critical update for individuals with a history of immigration breaches concerns the new, stricter stance on overstaying and voluntary departure.
Voluntary Overstaying Now Triggers Mandatory Bans
Under the previous rules, an individual voluntarily leaving the UK after overstaying their visa was not always considered a strong reason for a future visa refusal, particularly in family-based applications. This flexibility has been sharply curtailed.
The new Part Suitability officially lists a voluntary departure after overstaying as a potential ground for mandatory refusal, introducing an explicit "cooling-off period" or re-entry ban for future applications.
Minimum Re-Entry Ban: A person who has previously breached immigration laws, and then departs the UK voluntarily at their own expense, now faces a mandatory 12-month re-entry ban from the date of departure. This is a significant tightening of the rules, making a future refusal a foregone conclusion if an application is made within this period.
Serious Breaches: The re-entry ban can extend to two years if the departure was at public expense (within six months of the decision to remove), and up to 10 years for the most serious breaches, such as illegal entry or using deception in an application, or if the person was removed from the UK at public expense.
Disregard for Minor Overstaying: There is a narrow exception where overstaying will be disregarded if an applicant applies for a new visa within 14 days of their previous visa expiry and provides a reasonable explanation with evidence for the delay (e.g., a medical emergency). This is now codified in Part Suitability.
Caseworker Discretion and Mitigating Circumstances
While the new bans are mandatory when the rules are engaged, the Home Office caseworker retains some discretion when assessing past breaches. Before refusing an application, a caseworker must still consider several factors:
- Circumstances of the Breach: Why the immigration breach occurred.
- Time Elapsed: When the breach took place and how much time has passed since then.
- Personal Factors: The applicant’s personal and family circumstances.
However, the bar for overcoming a mandatory refusal has been raised. The only way to succeed against a mandatory refusal ground is by meeting a very high threshold of exceptional circumstances, a legal test designed to be challenging to meet. This applies even to family and private life applications, which are now fully subject to the Part Suitability framework.
The essence of the reform is a clearer, more powerful legal mandate for the Home Office to deny entry to those who have previously remained in the UK longer than permitted. Individuals with a history of overstaying or other breaches are now strongly advised to seek professional immigration advice before submitting any new visa application, ensuring a detailed explanation and evidence of any mitigating circumstances is prepared.