The Home Office briefed the media following the raid on the Shotton Mill site in Deeside, north Wales warning that precast concrete specialist McCann and frame contractor Adana Construction could face fines of up to £225,000 after 13 people were arrested.

Immigration officials decided to take no action against FP McCann earlier this week.

And now Adana Construction has also been issued with a “No Action Notice” from the Immigration Enforcement division of the Home Office after it was established that all its employees were suitably qualified to work in the UK.

Adana Commercial Director Danny Tennant said: “We confirm we are content with this matter now being closed with no enforcement action being taken.

“We appreciate the swift investigative action by the Home Office and their supportive statement of our best practice as a company generally in advising those working for us on our strict anti-slavery policy requirements.”