A monitored CCTV system does not automatically mean the police will attend when an alert is raised. In England, Wales and Northern Ireland, police forces follow requirements published by the National Police Chiefs' Council (NPCC). To be eligible for a police response, a detector-activated CCTV system normally needs a police-issued Unique Reference Number (URN). To get one, it must be installed to BS 8418 and monitored by a recognised monitoring centre, with the companies involved independently certificated. Without a URN, the monitoring centre will usually contact your keyholders instead.
For a warehouse, yard or industrial site, settle this before you compare prices.
What a URN means for monitored CCTV
The NPCC requirements divide security systems into two broad types.
For detector-activated CCTV intended to qualify for police response, ask for confirmation of the applicable BS 8418 requirements, the monitoring-centre standards and the police URN arrangements. Check the certification scope of the installing, maintaining and monitoring companies, rather than relying on a general accreditation logo.
Systems outside the compliant police-response scheme do not have the same response arrangements. Ask the monitoring company to explain the escalation process and what evidence would be needed for a police report. Adding a monitoring subscription does not by itself establish eligibility.
An eligible system still cannot guarantee police attendance. Operational demand and police resources affect the response. A proposal should clearly distinguish monitoring-centre actions from decisions made by the police.
Do not confuse the two "Type A" labels
BS 8418:2021 also uses the terms Type A and Type A+. These are design tiers within the standard: Type A+ adds features intended to detect or prevent the system being compromised on higher-risk sites. They are separate from the NPCC's Type A and Type B classification. If both appear in a proposal, ask which is meant.
When the monitoring centre will call the police
Ask the monitoring centre what evidence its operators require before escalating an incident. The written response plan should distinguish suspected criminal activity from authorised staff, deliveries and other normal site activity.
Repeated false calls can jeopardise police-response arrangements. Ask the provider to explain the current force policy and how unwanted activations from normal site activity, wildlife, weather and lighting will be investigated and reduced.
Your responsibilities as the site operator
Police-response arrangements also place obligations on the site operator. Agree who acts as keyholder, how they are contacted and how quickly they must attend. Confirm the number of keyholders and attendance conditions against the current police requirements for your site.
If you use a commercial keyholding provider, check that its coverage and contract meet those requirements. Confirm any URN administration fees and discuss the proposed response arrangements with your insurer.
Before signing, obtain a written explanation of the police-response arrangements, any conditions you must meet and what happens if response is withdrawn.
Existing cameras and police response
Connecting existing cameras to a monitoring service may be possible, but that is not the same as having a BS 8418 system with a URN. An existing installation must be assessed against the standard and the police requirements before anyone can say whether it qualifies, and the assessment may find that changes are needed. Until that has been confirmed, plan on the basis that alerts will go to your keyholders.
Data protection still applies
Monitoring adds another organisation handling your footage. Information Commissioner's Office (ICO) guidance says a data protection impact assessment is required in most cases involving video surveillance. Retention periods should be based on your purpose, not on how much the recorder can store. Signs should be clear and visible before people enter the monitored area. The ICO also expects written contracts with organisations processing data on your behalf, including the monitoring provider.
Questions to ask before you sign
Is the proposed system intended to qualify for a police URN? If so, who applies for it, and who pays the administration fee?
Which companies will design, install, maintain and monitor the system? Which certification body certificates each of them, and for which scope?
Which monitoring centre will handle alerts, and which standards does it meet?
Which events trigger an alert, and what happens if connectivity or power is lost?
What is the escalation route if police response is not available or has been withdrawn?
How will false activations be reviewed and reduced?
You can check a company's approvals directly with certification bodies such as NSI and SSAIB. The police do not recommend individual companies.
Discuss your monitoring requirements
If police response matters to your site, say so at the start. Tell MCN Fire & Security about your premises, operating hours, existing cameras and current keyholder arrangements. Ask for the proposal to state clearly which response arrangements apply and which do not. You can request a CCTV monitoring assessment or send us your site details.
Further guidance: NPCC Police Advice and Security Industry Requirements for Response to Security Systems (2026) · NSI: NPCC releases 2025 policy update for police response to security systems · BSI: BS 8418:2021 Detector-activated video surveillance systems, code of practice · NSI: Publication of British Standard BS 8418:2021 · ICO: Video surveillance guidance, accountability responsibilities · ICO: Video surveillance guidance, complying with the data protection principles · NSI company finder · SSAIB supplier search