The London Evening Standard reports that the scam is said to based on tax relief for bogus charitable donations.
A fraud investigation team from the Inland Revenue questioned the workers about the scam which has allegedly been running for some while.
The sum involved could be as much as £2 million.
It came to light after the Inland Revenue began investigations into certain aspects of allegations of racial harassment and bullying by production line employees last year.
Richard Le Tocq, head of Locate Guernsey, discusses the chancellor’s approach to high net worth individuals, and why relocation is increasingly attractive to HNWIs
The firm says that the U-turn 'does not alter the need for a fundamental review of the way we tax work' and that the current tax system is in need of reform
Legislation on the NICs changes to be brought forward in the autumn following publication of 'the full effects of the changes to Class 2 and Class 4' in the summer
Following chancellor Philip Hammond’s Spring Budget speech, we explore the key takeaways for businesses and individuals