Referral to the National Audit Office
Potential Assurance Failure Affecting National Stolen-Vehicle Data
Date: 28/05/2026
- Purpose of Referral
This referral concerns a potential systemic assurance and data-integrity issue affecting stolen-vehicle records held across policing systems and the Driver and Vehicle Licensing Agency (DVLA).
The issue arises from the automated deletion (“weeding”) of unconfirmed Lost or Stolen (LoS) vehicle markers placed on the Police National Computer (PNC), and the apparent discrepancy between police-recorded vehicle theft figures and DVLA stolen-vehicle notifications.
The purpose of this referral is not to allege misconduct or operational failings by individual officers or forces, but to identify a possible weakness in end-to-end governance, reconciliation, and assurance arrangements across multiple public bodies.
- Issue Summary
When a vehicle is reported stolen, a LoS marker is placed on the PNC.
Where that marker is not “confirmed” within weeks, it is automatically deleted (“weeded”), even where the vehicle has not been recovered.
Only confirmed LoS records are transmitted to the DVLA.
The result is that a vehicle may:
• be reported stolen,
• remain unrecovered,
• yet cease to appear as stolen on PNC and DVLA systems.
- Why the Issue Appears Material
Analysis undertaken using publicly available and FOIA-derived data indicates a persistent discrepancy between:
• police/Home Office vehicle theft figures, and
• DVLA stolen-vehicle notifications.
The discrepancy:
• appears substantial,
• varies significantly between constabularies,
• and appears consistent with the operation of automated deletion processes.
A supporting analytical paper (“The Extent of Weeding”) accompanies this referral.
- Assurance and Governance Concerns
The issue appears to raise several questions relevant to the NAO’s remit:
A. Ownership and accountability
It is unclear which public body has end-to-end ownership of assuring that vehicles reported stolen remain recorded as stolen until recovery.
B. Control effectiveness
Reliance on manual confirmation processes to prevent automated deletion may represent a weak control for a high-impact dataset.
C. Reconciliation
No evidence has been identified of routine reconciliation between:
• police-recorded vehicle thefts,
• retained PNC LoS records,
• and DVLA stolen-vehicle notifications.
D. Statistical integrity
If unrecovered vehicles are falling out of national systems, there may be implications for:
• the completeness of published vehicle-crime statistics,
• recovery metrics,
• and downstream reliance on government-held data.
- Engagement with Relevant Bodies
The accompanying material has previously been provided to:
• the Home Office,
• HMICFRS,
• the NPCC,
• and Gwent police.
In March 2026, the Home Office confirmed that the issue was being considered internally with the NPCC. However, no substantive indication of ownership, reconciliation activity, or assurance review has since been communicated.
- Suggested Areas for Consideration
The NAO may wish to consider:
• whether adequate assurance exists over the completeness of stolen-vehicle data;
• whether governance responsibilities are clearly defined;
• whether current controls are proportionate to the risks posed;
• and whether Parliament can place appropriate reliance on published figures derived from these systems.
- Conclusion
If automated deletion of unconfirmed LoS records is materially contributing to under-recording, the issue is likely to be systemic rather than isolated.
The matter therefore appears to engage broader questions of public-sector data assurance, governance, and accountability across interconnected national systems.
Supporting material can be provided if required.
The Extent of ‘Weeding’ of Stolen Vehicle Records on the PNC and DVLA –