Nine arrests were made after the raid of the Brentford-based company's facility by the UK Border Agency on
11 March.

Euroworld has been warned it will face the fine unless it can prove the correct right-to-work checks were carried out on staff.

Officers had been tipped off that some of the company's workers were not eligible to work in the UK.

Nine workers, including six Indian men, two Indian women and a Nigerian man, were arrested for a variety of immigration offences.

Four of the Indian nationals arrested have been deported, the other four are in detention pending their removal. The Nigerian national remains in custody pending further enquiries.

Assistant director Ben Kelso, head of the Hounslow local immigration team, said: "I hope these raids send out a strong message that we are determined to make Hounslow a less attractive place for illegal immigrants.

"Illegal working has a serious impact on communities, taking jobs from those who are genuinely allowed to work and affecting law-abiding businesses."

Euroworld was unavailable for comment as PrintWeek went to press.

Civil penalties for businesses that fail to carry out proper checks when employing non-EU migrant workers were introduced by the government in February 2008.

The BPIF has previously warned that print is an easy target for illegal immigrants.