A major surge in immigration enforcement has led to more than 1,000 arrests in Wales and the West of England since the election.
The crackdown is part of a nationwide effort to combat illegal working in the UK.
Immigration Enforcement teams have been focusing on those who abuse the UK immigration system and exploit vulnerable people, as part of the Government’s Plan for Change.
The initiative primarily targets employers who facilitate illegal working, often forcing migrants to work in dire conditions and for pay below the minimum wage.
Restaurants, nail bars, and construction sites are among the businesses scrutinised.
From July 5 last year to May 31, 1,477 visits resulted in 1,057 arrests, marking a 96 per cent and 114 per cent rise respectively compared to the previous year.
This effort is part of a nationwide drive that has seen a 48 per cent increase in illegal working visits and a 51 per cent rise in arrests across the UK.
Dame Angela Eagle, minister for border security and asylum, said: “These figures send a clear message: Illegal working will not be tolerated in the UK.
“Under our Plan for Change, we are restoring order to the immigration system by introducing tougher laws and bolstering our enforcement action.
“On our watch, there will be no hiding place from the law as we work to protect the integrity of our border.”
In January, six Romanian nationals were arrested at a dairy farm in Llangedwyn for breaching their visit visas.
Another visit to a solar farm in Anglesey on March 20 led to 16 arrests.
The government is now introducing new laws to extend right-to-work checks on those hiring gig economy and zero-hours workers in sectors like construction, food delivery, beauty salons, and courier services.