More than 80 illegal workers have been detained as part of a nationwide government crackdown on businesses hiring migrants unlawfully.
In the week from August 18 to 24, Immigration Enforcement teams targeted more than 275 premises, with a particular focus on car washes.
A total of 135 businesses received notices for employing illegal workers.
Officers also detained 85 illegal workers.
Home Secretary Yvette Cooper announced last month that the government would crack down on employers who are hiring migrants illegally, as part of work aimed at disrupting the criminal networks who bring the workers to the UK.
The government said in a statement that in many cases, illegal workers live in squalid conditions on-site, earn far below the UK national minimum wage, and work longer hours than legally allowed. They may have entered the UK illegally, overstayed their visas or arrived under visitor conditions.
The government said further, similar crackdowns will be carried out soon.
The maximum civil penalty for employing illegal workers is £45,000 per worker for a first offence, and £60,000 per worker for repeat violations.
Home Secretary Yvette Cooper said: “It is completely wrong that dodgy employers can work hand-in-glove with the smuggling gangs who risk people’s lives to bring them here illegally and push them into off-the-books employment.
“These workers are sold complete lies by the gangs before being made to live and work in appalling conditions for a pittance. We are determined to put a stop to this, which is exactly why we have launched crackdowns such as this.
“While this operation marks an important step forward, our commitment to tackling this issue is ongoing. We will ensure those who break the rules face the full force of the law.”
Director of Enforcement, Compliance and Crime at Immigration Enforcement, Eddy Montgomery said: “This week’s operation shows how dedicated the Home Office is to protecting vulnerable people and holding employers accountable.
“We’re dedicated to stopping exploitation by criminal gangs, ensuring vulnerable people receive the correct support and make sure that those who break the law face serious consequences.
“I’m incredibly proud of our teams across the country for their hard work and teamwork in preparing for and conducting this national operation.”
