A standard "bells-only" alarm makes a noise and relies on neighbours or passers-by to react. A monitored alarm sends signals to an Alarm Receiving Centre (ARC), which can call keyholders or, for systems with a URN, request a police response.
What is a URN?
A Unique Reference Number is issued by your local police force to an alarm system that meets the National Police Chiefs' Council (NPCC) requirements. When the ARC receives a confirmed alarm from that system, it can quote the URN to request police attendance.
Who can get one?
Only systems installed and maintained by a company accredited by an approved inspectorate such as SSAIB or NSI can apply. FITZ FIRE & SECURITY is SSAIB certificated, so we can install and maintain police-response systems.
What does the system need?
- Design and installation to BS EN 50131 and PD 6662, at the right security grade for the property
- Confirmation technology, so false alarms aren't passed to the police
- A monitoring contract with an approved ARC
- Regular maintenance, as set out in the standards
- At least two keyholders who can attend within 20 minutes
Is police response right for me?
For many homes, an app-controlled alarm with keyholder monitoring is enough. Businesses with valuable stock, and insurers who require it, often need police response. We'll talk you through the options. See our intruder alarm services.
Published 24 October 2026 by FITZ FIRE & SECURITY. This guide is general information, not a substitute for a site-specific assessment.