The Hidden Epidemic: Identifying Modern Slavery in the UK Property Sector

Local authorities across the UK are facing a mounting crisis that extends far beyond standard housing enforcement. Behind the closed doors of seemingly ordinary properties, a hidden epidemic of modern slavery and exploitation is taking place. As criminal networks increasingly exploit the private rented sector to facilitate their operations, the role of council housing and revenue teams in identifying and disrupting these activities has never been more critical.

The Intersection of Housing and Exploitation

The link between poor housing standards and severe safeguarding issues is well established. Criminal organisations, including those involved in county lines drug trafficking and human exploitation, rely heavily on the anonymity provided by the private rented sector. Properties that operate under the radar, such as unlicensed Houses in Multiple Occupation (HMOs) or homes incorrectly registered for Council Tax, are frequently utilised to house vulnerable individuals or facilitate illicit activities.

Recent statistics underscore the scale of the challenge. In 2024, the National Referral Mechanism (NRM) received 19,125 referrals of potential victims of modern slavery, representing a 13 per cent increase compared to the preceding year and marking the highest number of referrals since the system began [1]. A significant proportion of these victims are housed in residential properties, often enduring severe overcrowding, inadequate sanitation, and dangerous living conditions.

Recognising the Indicators

For local authorities, the challenge lies in identifying these properties before a crisis occurs. Traditional, reactive enforcement methods are often insufficient to detect the subtle signs of exploitation. However, by analysing the financial and administrative footprints associated with a property, councils can uncover anomalies that strongly indicate illicit activity.

Key indicators that a property may be linked to modern slavery or exploitation include:

• Excessive Financial Footprints: A property registered for a Single Person Discount or as a single-family home, yet associated with multiple active financial signals, such as numerous mobile phone contracts, credit applications, or bank accounts.
• Frequent Changes in Occupancy: High turnover of residents or a constant stream of new financial footprints linked to the address, which may indicate the property is being used as a transit hub for exploited individuals.
• Discrepancies in Council Tax Records: Properties where the registered Council Tax payer does not match the individuals generating financial activity at the address, suggesting the property may be sublet or controlled by a third party.
• Indicators of Overcrowding: A volume of financial activity that far exceeds the physical capacity of the property, pointing to severe overcrowding and potential exploitation.

The Limitations of Traditional Approaches

Historically, councils have relied on physical inspections, tenant complaints, or cross-referencing static datasets like the Electoral Roll to identify problematic properties. These methods are inherently limited. Criminal networks are adept at evading detection; they do not register to vote, and they often coerce victims into silence.

Furthermore, physical inspections are resource-intensive and often reactive. By the time an enforcement officer visits a property in response to a complaint, the individuals involved may have already been moved, or the evidence of exploitation concealed. To effectively combat modern slavery, local authorities must adopt a proactive, intelligence-led approach.

A Data-Driven Strategy for Disruption

The most effective weapon against property-based exploitation is data. Every individual, regardless of their circumstances, generates a digital footprint through their daily financial interactions. By aggregating and analysing these signals, councils can build a comprehensive picture of property usage without relying on self-reporting or physical inspections.

This is the foundation of OccupID's approach to property occupancy intelligence. By securely ingesting internal council data and cross-referencing it against over 70 distinct external financial sources, we can identify properties that exhibit the hallmark signs of hidden occupancy and potential exploitation.

Our intelligence engine does not rely on personal identifiable information. Instead, it analyses patterns of financial activity to generate a confidence score, highlighting properties where the declared occupancy significantly diverges from the reality on the ground. This allows local authorities to:

• Target Enforcement Resources: Focus inspections and interventions on high-risk properties, rather than relying on random checks or reactive complaints.
• Enhance Safeguarding Efforts: Identify properties where vulnerable individuals may be housed, enabling early intervention by safeguarding teams and law enforcement partners.
• Disrupt Criminal Networks: By identifying and tackling unlicensed HMOs and properties linked to fraud, councils can dismantle the infrastructure that criminal organisations rely upon.
• Recover Vital Revenue: Correcting erroneous Council Tax records and identifying unlicensed properties not only improves safety but also recovers essential revenue for the local authority.

Conclusion

The fight against modern slavery and exploitation requires a coordinated, multi-agency approach. Local authorities are on the frontline of this battle, and housing and revenue teams possess a unique opportunity to identify and disrupt these hidden crimes.

By moving beyond traditional enforcement methods and embracing data-driven property intelligence, councils can transform their approach from reactive to proactive. In doing so, they not only protect the public purse and improve housing standards but, most importantly, they play a vital role in safeguarding the most vulnerable members of society. The data exists to uncover these hidden operations; it is now imperative that local authorities have the tools to use it effectively.

References

[1] Home Office, "Modern slavery: National Referral Mechanism and Duty to Notify statistics UK, end of year summary 2024," GOV.UK, 6 March 2025. [Online]. Available: GOV.UK.