The United Kingdom has arrested more than 17,000 people for illegal working since July 2024, as authorities intensify efforts to enforce immigration laws. The crackdown has also increased pressure on businesses that employ people without the legal right to work.
The UK Home Office reported a significant rise in immigration enforcement visits and arrests. Moreover, the number of arrests has more than doubled compared with the previous two years.
Illegal Working Arrests Rise Under Labour Government
In August, the Home Office reported a 122% increase in arrests for illegal working since the Labour government took office in July 2024. The figures highlight the scale of enforcement activity during the period.
Meanwhile, immigration raids also increased during the first half of 2026. Authorities conducted 7,270 raids in the first six months, representing a 31% rise compared with the same period last year.
These operations resulted in 4,756 arrests, marking a 20% increase year-on-year. The figures indicate that enforcement teams have stepped up action against suspected illegal employment across the country.
London Records the Highest Number of Arrests
London recorded the highest number of arrests during the reported period, with 1,256 people detained. The West Midlands followed with 701 arrests, while South West England recorded 693.
The regional figures show that enforcement activity has affected several parts of the UK. However, London recorded considerably more arrests than either of the other two regions listed.
Employers Face Millions in Financial Penalties
The crackdown has also targeted businesses that fail to meet their legal responsibilities. Employers in the beauty, retail and hospitality sectors faced £74 million in civil penalties during 2026 for violations linked to illegal employment.
Under UK law, businesses must check whether their employees have the legal right to work in the country. Employers who fail to carry out these checks can face financial penalties and criminal prosecution.
Consequently, companies must follow the required employment verification procedures to avoid potential legal action. The penalties also underline the financial risks businesses face when they breach immigration rules.
UK Government Vows Continued Enforcement
Home Secretary Shabana Mahmood described the enforcement campaign as the highest in British history. She also warned that authorities would continue taking action against illegal workers and employers who violate immigration laws.
The government’s approach combines workplace enforcement with penalties for businesses that fail to comply with legal requirements. Meanwhile, the latest figures show rising arrest numbers and increased raids during the first six months of 2026.
Authorities are continuing to target illegal working as part of their wider immigration enforcement efforts. Employers across affected sectors must therefore ensure they meet their legal obligations when hiring staff.
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