United Kingdom Immigration Enforcement officers arrested more than 4,700 people working illegally in the country during the first six months of 2026, the Home Office has announced.

Official figures show that 4,756 arrests were made between January and June, a 20 per cent rise from the same period in 2025.

Officers carried out 7,270 raids on businesses, up 31 per cent year-on-year, as the country intensifies its crackdown on illegal working.

The Home Office, in a statement posted on its X handle on Tuesday, described the results as the most successful six-month period in British history.

It said, “Latest figures show that in the first six months of 2026, Immigration Enforcement arrested more than 4,700 illegal workers – the most successful six-month period in British history.