The Illegal Migration Act 2023 represents one of the most significant pieces of UK immigration legislation in recent years. It fundamentally changes how the government deals with people who arrive in the UK through irregular routes and has wider implications for the asylum system, modern slavery protections, and immigration enforcement.

What Is the Illegal Migration Act?

Passed into law in July 2023, the Illegal Migration Act was designed to deter irregular migration — particularly small boat crossings across the English Channel. The Act gives the Home Secretary a duty to remove individuals who arrive in the UK without prior permission, with very limited exceptions. It marks a shift from a case-by-case assessment of asylum claims to a blanket policy based on the method of arrival.

Key Provisions of the Act

The Act introduces several far-reaching measures:

• Duty to remove: The Home Secretary must remove individuals who enter the UK illegally, either to their home country or a safe third country, without first considering their asylum claim
• Inadmissibility of asylum claims: People who arrive irregularly are barred from claiming asylum in the UK. Their claims are deemed inadmissible regardless of merit
• Detention powers: The Act grants expanded powers to detain individuals pending removal, with limited judicial oversight during the initial 28-day period
• Modern slavery exemption limits: Previously, potential victims of modern slavery or trafficking could receive support and a recovery period. The Act restricts these protections for those who arrived irregularly
• Lifetime immigration ban: Individuals removed under the Act face a permanent ban on re-entry to the UK, including via any legal immigration route
• Age assessment: The Act introduces scientific methods for age assessment of those claiming to be children

Who Is Affected?

The Act primarily targets individuals who:

• Arrive in the UK without a valid visa or entry clearance
• Cross the Channel in small boats or other irregular means
• Enter the UK hidden in vehicles or freight
• Overstay their visa and then claim asylum

It does not affect people who apply for visas through regular channels — such as Skilled Worker visas, family visas, student visas, or visitor visas. If you have valid leave to remain or are applying through legal routes, the Act does not change your position.

Impact on the Asylum System

The Act has drawn significant criticism from human rights organisations, the UNHCR, and immigration lawyers. Critics argue that it conflicts with the UK’s obligations under the 1951 Refugee Convention, which states that refugees should not be penalised for their method of arrival. Legal challenges are ongoing, and several provisions have been subject to judicial scrutiny.

For asylum seekers already in the UK system before the Act came into force, the impact depends on when and how they arrived. Those with existing asylum claims are generally proceeding through the legacy system, though backlogs remain substantial.

Implications for Employers

Employers should be aware that the Act strengthens the government’s enforcement framework. Right-to-work checks remain essential, and employers who knowingly employ individuals without valid immigration status face increased penalties. The civil penalty for employing an illegal worker has risen to up to £60,000 per worker for repeat offenders.

What Should You Do?

If you are concerned about how the Illegal Migration Act affects you or your family:

• If you are in the UK legally, ensure your visa remains valid and apply for extensions in good time
• If you have an asylum claim, seek specialist legal advice immediately
• If you are an employer, ensure your right-to-work checking procedures are robust and up to date
• Do not rely on social media or informal advice — the Act is complex and still evolving

How IAUK Manchester Can Help

Our IAA-regulated advisers are closely monitoring the implementation of the Illegal Migration Act and its legal challenges. If you need advice on your immigration status, asylum claim, or employer compliance obligations, contact us for a confidential consultation. We provide clear, honest guidance based on the latest legal position.