LONDON — Recent guidance issued by the UK Home Office has alerted the country's growing private intelligence and security industry about the legal repercussions of engaging in work for hostile states, such as Russia, China, and Iran.

Under new national security laws, professionals found inadvertently working for these nations could face imprisonment for up to 14 years.

The directives urge UK security companies to thoroughly vet their clients to ensure they are not inadvertently aiding foreign powers seeking to compromise UK interests.

The prominence of private intelligence firms has risen in recent years within the UK, many employing former members of British security services to offer insights and analysis to their clientele.

The guidance is informed by assessments from MI5 and MI6, identifying major overseas threats primarily originating from Russia, Iran, and China.

Potential assignments from foreign states may include collecting intelligence on dissidents, accessing protected information within academia, and manipulating supply chains through investment.

Security minister Dan Jarvis, writing for City Security magazine, emphasized the vulnerability of UK security professionals to exploitation by foreign entities, pointing out that hostile actors might use covert methods or intermediaries to obscure their intentions.

Jarvis advised firms to exercise thorough due diligence to avoid engaging detrimental activities on behalf of foreign powers.

The private intelligence sector has become a focal point for UK security services.

In a recent update, MI5 Director General Ken McCallum noted an increasing trend of nations like Russia and Iran employing private operatives to conduct activities within the UK.

The government's ongoing crackdown includes notable incidents, such as the 2024 police detention of Andrew Wordsworth, co-founder of Raedas, at Bristol City airport.

While Wordsworth's firm denied any links to Russia and no further actions were taken against them, the event highlights the government's intensified scrutiny of the sector.

This announcement coincides with anticipated changes to the Foreign Influence Registration Scheme (FIRS), a U.S.-style register intended to document foreign political influence activities within the UK. The initiative has been delayed due to recent political developments but aims to enhance protections against international actors perceived as risks to UK interests.

Recent calls have been made to classify China within an enhanced tier following reports of an alleged Chinese spy operating in the UK.