Almost 100 people who work in nail bars have been arrested on suspicion of immigration offences.
The arrests come as part of a crackdown on illegal working, according to the BBC.
More than 280 nail bars were targeted by the Government’s Operation Magnify. They said they would identify and help the victims of trafficking.
Most of those arrested were Vietnamese nationals, but some were immigrants from Ghana, China, Mongolia, Nigeria, Pakistan and India.
Fourteen of those arrested were passed to the National Referral Mechanism, who help possible victims of slavery and human trafficking.
Warnings were sent to 68 businesses that they will have to pay £20,000 per illegal worker if they cannot prove they performed right-to-work document checks.
The nail bars were targeted between November 27 and December 3.
The operation has also targeted cleaning, catering, construction, care, taxi and car wash industries.