Automated license plate readers raise privacy, contract and oversight questions for UK cities

A new analysis of automated license plate recognition (ALPR) cameras, published by Smart Cities Dive and focused on the US vendor Flock Safety, raises questions about resident involvement, contract transparency, usage rules and safety outcomes that are directly relevant to London as the technology expands across the capital.

Transport for London and several London boroughs already operate extensive ALPR networks for congestion charging, low emission zone enforcement, bus lane monitoring and traffic management. The technology reads vehicle registration plates at specific locations and can log vehicle movements over time. The US analysis, drawing on expert interviews and case studies, identifies six considerations that city governments should address before adopting or expanding such systems.

For London readers, the piece offers a useful checklist against which current local practice can be measured, particularly as boroughs consider new camera deployments for traffic enforcement, school street monitoring and potential future uses such as pay-per-mile road pricing.

Six considerations for camera programmes

The Smart Cities Dive article, published 20 October 2026, synthesises advice from privacy researchers, local government officials and civil liberties groups. The six points are: involve residents early, scrutinise vendor contracts, establish clear usage rules, track whether cameras improve public safety, ensure data retention limits are enforced, and create independent oversight mechanisms.

The article notes that Flock Safety, which sells ALPR cameras to hundreds of US police departments and municipalities, has faced criticism over data sharing practices, contract lock-in periods and a lack of public transparency about how camera data is used. Flock has defended its products as tools for solving crime and recovering stolen vehicles.

While the US legal and policing context differs from the UK, the underlying governance questions are similar. London already has a dense camera network, but the expansion of ALPR into new use cases such as automated traffic enforcement, clean air zone compliance and potential road user charging means the same issues of consent, oversight and data stewardship are live.

London’s existing ALPR landscape

Transport for London operates the largest ALPR network in the UK, with cameras at every congestion charge and ULEZ boundary point, as well as on key routes for traffic monitoring. The data is used for enforcement, journey time measurement and traffic modelling. TfL states that it retains ANPR data for a limited period and that access is restricted to authorised personnel.

London boroughs also deploy ALPR cameras for bus lane enforcement, moving traffic offences and school street monitoring under powers granted by the Traffic Management Act 2004 and the London Local Authorities Act. Some boroughs have begun using mobile cameras that can be moved between locations.

The London Data Store publishes some information on camera locations, but transparency varies between boroughs. A 2025 report from the London Assembly’s Transport Committee recommended that TfL and boroughs publish more detailed data on camera locations, retention periods and enforcement outcomes.

Contract and vendor scrutiny

The US analysis highlights the importance of scrutinising vendor contracts, particularly around data ownership, access rights and termination provisions. In London, TfL and boroughs procure cameras through frameworks including the Crown Commercial Service and London-wide procurement agreements. Contracts are typically awarded to suppliers such as Jenoptik, Siemens and Yunex Traffic, with some boroughs also using smaller vendors.

The question of data ownership is particularly relevant. If a vendor retains rights to ANPR data or can repurpose it for product development, that raises privacy concerns. London boroughs should ensure that contracts explicitly state that all ANPR data belongs to the authority, not the vendor, and that data cannot be shared with third parties without explicit consent.

Contract lock-in is another concern. Some camera systems use proprietary software and data formats, making it difficult for authorities to switch vendors without replacing hardware. The London Assembly’s Transport Committee has previously called for open standards in traffic enforcement technology to avoid vendor dependency.

Usage rules and public transparency

The US analysis recommends that cities establish clear, publicly available rules about what ALPR data can be used for, who can access it and how long it is retained. In London, TfL publishes a data protection impact assessment for its ANPR systems, but borough-level transparency is inconsistent.

Some boroughs have published privacy notices for their camera programmes, but others provide minimal information. The Smart Cities Dive article notes that residents often do not know whether cameras are present, what data is collected or how to challenge enforcement decisions.

For London, the lesson is that transparency should be the default. Boroughs should publish camera locations, data retention periods, access logs and enforcement statistics on a regular basis. The London Data Store could host a central register of all ALPR cameras operated by TfL and boroughs.

Does ALPR improve public safety?

The US analysis questions whether ALPR cameras actually reduce crime or improve road safety, noting that evidence is mixed. Some studies show that cameras can help recover stolen vehicles and identify suspects, but others find no significant impact on overall crime rates.

In London, the evidence is similarly contested. TfL cites data showing that ULEZ and congestion charge cameras have reduced traffic and improved air quality, but enforcement cameras for moving traffic offences have generated controversy over penalty notices and accusations of revenue raising.

The London Assembly has called for independent evaluation of camera programmes, comparing outcomes in areas with and without cameras. Without such evaluation, it is difficult to know whether the benefits justify the privacy costs and public expenditure.

Key facts
| Consideration | Current London practice | Gap or opportunity |
|—————|————————|——————–|
| Resident involvement | Limited consultation on new camera deployments | Boroughs could hold public meetings before installing new ALPR cameras |
| Contract scrutiny | TfL and boroughs use procurement frameworks | Open data on contract terms and data rights is not routinely published |
| Usage rules | TfL publishes DPIA; boroughs vary | Central register of camera locations and data policies needed |
| Safety evidence | TfL cites enforcement data | Independent evaluation of crime and safety impacts is lacking |

Oversight and accountability

The US analysis recommends independent oversight of ALPR programmes, either through a privacy commission, a police oversight board or a dedicated data governance body. In London, the London Assembly’s Transport Committee and Police and Crime Committee have some oversight role, but there is no dedicated body with authority to audit camera programmes across all boroughs.

The Information Commissioner’s Office (ICO) can investigate data protection breaches, but its resources are limited. A London-specific oversight body, perhaps modelled on the London Data Commission proposed by some civil society groups, could provide ongoing scrutiny and publish annual reports on camera use.

Next checks for London readers

London residents and campaigners can check whether their borough has published a privacy notice for camera programmes, ask their councillors about contract terms with camera vendors, and submit freedom of information requests for data on camera locations, enforcement outcomes and data retention periods.

The London Assembly could hold a public hearing on ALPR governance, inviting TfL, borough representatives, privacy experts and civil liberties groups to give evidence. The Mayor of London could commit to publishing a London-wide ALPR transparency standard.

Source: Smart Cities Dive, “Got Flock cameras? 6 things to consider”, 20 October 2026. https://www.smartcitiesdive.com/news/got-flock-cameras-6-things-to-consider/833453/

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