What Is an Alarm Receiving Centre (ARC)?
Most responsible persons know their building has a fire alarm. Fewer know what happens to the signal once it leaves the panel, and whether anyone is actually watching at two in the morning. That gap is where an Alarm Receiving Centre comes in — and understanding how they work, and when they are genuinely necessary, is increasingly relevant for anyone managing a building with sleeping occupants or significant out-of-hours risk.
An Alarm Receiving Centre, usually referred to as an ARC, is a dedicated 24-hour monitoring facility staffed by trained operators who receive alarm signals from fire detection systems, intruder alarms, and other life-safety systems installed in buildings across the country. When your fire alarm activates, the signal does not simply sound a sounder and wait for someone on site to respond: if the system is connected to an ARC, that activation is transmitted electronically to a remote monitoring station where an operator assesses it and initiates a defined response, which might mean contacting the fire and rescue service, alerting a nominated keyholder, or attempting to verify whether the activation is genuine before escalating further.
The standard that governs ARC operations in the UK is BS EN 50518, which sets requirements for the physical security and resilience of monitoring centres, the technical infrastructure they must operate, and the competency of their staff. A reputable ARC will hold third-party accreditation, typically through the NSI (National Security Inspectorate) or SSAIB (Security Systems and Alarms Inspection Board), and that accreditation matters both for compliance purposes and for insurers, who are increasingly specific about the quality of monitoring arrangements they expect for higher-risk premises.
How an ARC receives and acts on alarm signals
The connection between a fire alarm panel and an ARC is established through a signalling system, and the type of signalling used has a bearing on how reliably the signal reaches the monitoring centre. Older installations may use a digital communicator over a public telephone line, which is functional but carries a single point of failure; if the line is cut or the exchange is disrupted, the signal does not get through. More modern installations use dual-path signalling, combining a primary channel such as a broadband or GPRS connection with a secondary backup, so that a single infrastructure failure does not sever the link. BS 5839-1, the primary standard for fire detection and alarm systems in non-domestic premises, addresses remote transmission of alarm signals in Section 4 and recommends dual-path arrangements for premises where reliable transmission is critical.
Once a signal is received, the operator follows a predefined action plan agreed with the building owner or responsible person at the time of commissioning. For a fire signal, that action plan will typically specify whether the operator should contact the fire service immediately, attempt to reach a keyholder first, or apply a confirmation protocol before escalating. The choice of protocol is not arbitrary: it reflects the building's occupancy, its history of false alarms, and any specific requirements from the local fire service.
The confirmed fire approach: many fire and rescue services across England now operate an Unwanted Fire Signal Management Policy, under which they will not automatically attend an automatic fire alarm signal from an unoccupied commercial premises during certain hours without some form of confirmation that the activation is genuine. An ARC operating a confirmed fire protocol — where a second device activating, a CCTV check, or a keyholder report is required before the fire service is called — is one of the ways responsible persons manage this, reducing unnecessary callouts while ensuring that a genuine fire still receives a rapid response.
When an ARC is required or strongly recommended
There is no single legal provision that requires all buildings to be connected to an ARC, but the obligation under the Regulatory Reform (Fire Safety) Order 2005 to ensure that fire-fighting services can be called quickly in the event of fire means that, for many premises, an unmonitored system is difficult to justify. The fire safety guides published by the government for different building types — covering care homes, hotels, offices, factories, and others — set out the specific expectations for each sector, and several of them treat ARC monitoring as a baseline expectation rather than an optional enhancement.
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1Care homes and supported living
The fire safety guide for sleeping accommodation is explicit that premises with sleeping occupants who may need assistance to evacuate should have their fire alarm system connected to a remote monitoring centre. The combination of high dependency occupants, night-time staffing levels that may be reduced, and the consequences of delayed detection makes ARC monitoring a near-universal expectation in this sector, and enforcing authorities will look for it.
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2Hotels and guest accommodation
Sleeping occupants who are unfamiliar with the building and its escape routes present an elevated risk at night, and the fire safety guidance for sleeping accommodation reflects this. ARC monitoring is the standard expectation for hotels and similar premises, and it will typically be a condition of insurance as well as an expectation of the relevant fire safety guide.
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3Unoccupied premises and out-of-hours risk
Offices, warehouses, and commercial premises that are unoccupied overnight present a straightforward case for ARC monitoring: there is no one on site to notice an activation, raise the alarm, or call the fire service, and a fire that is allowed to develop unchallenged for several hours in an unoccupied building carries obvious consequences both for the property and for any adjacent occupancies. Insurers are increasingly explicit about requiring monitored systems for commercial premises above certain values.
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4Premises with a history of false alarms
A building that generates frequent unwanted alarm signals faces the risk that the local fire and rescue service will withdraw automatic attendance and require confirmation before responding. An ARC with an agreed confirmation protocol can manage this relationship, filtering genuine activations from nuisance signals and helping the responsible person maintain a working relationship with the fire service rather than accumulating a record of unnecessary callouts.
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5Where insurers or enforcing authorities specify it
Some insurers will not offer cover for certain premises types without an ARC-connected system, and some enforcing authorities will include ARC monitoring as an action point in an enforcement notice or as a recommendation following an inspection. If your fire risk assessment or insurance schedule references monitored alarm systems, this is not a suggestion to be deferred indefinitely.
What ARC monitoring does not replace
An ARC is one component of a fire safety system, not a substitute for the others. A monitored alarm still needs to be properly designed, installed to BS 5839-1, regularly tested and maintained, and supported by a fire risk assessment that is current and accurate. The ARC can only act on the signal it receives, so a system with inadequate coverage, poorly sited detectors, or persistent false alarm issues will not be made safe simply by routing the signal to a monitoring centre. The two things need to work together, and the fire risk assessment is the document that should be confirming whether they do.
It is also worth noting that an ARC connection introduces an ongoing contractual and maintenance relationship that the responsible person needs to manage actively. Action plans need to be kept current — if keyholders change, if the building's occupancy changes, or if the evacuation strategy is updated, the ARC needs to know. An outdated action plan that sends the operator to contact a keyholder who left the organisation two years ago is not a reliable safety measure.
Churches Fire provide a useful overview of how a typical ARC operates in practice. Shared for explanation only — inclusion does not imply endorsement.
How we approach ARC monitoring in fire risk assessments
When we carry out a fire risk assessment for a building where out-of-hours risk is a relevant factor, we will review whether the existing fire alarm arrangements include remote monitoring, what type of signalling is in use, whether the ARC is accredited, and whether the action plan on file reflects the current state of the building and its occupancy. Where a building does not currently have ARC monitoring but the risk profile indicates it would be appropriate, we will say so clearly and explain the reasoning.
We work with buildings across Chester, the Wirral, Cheshire, North Wales, and the wider North West, covering everything from small commercial premises to large residential blocks and care environments. If you manage a building and are uncertain whether your current monitoring arrangements are adequate, or if your fire risk assessment is overdue, please get in touch.
Not sure if your building needs ARC monitoring?
We provide independent fire risk assessments for premises across Chester, the Wirral, Cheshire, North Wales, and the wider North West.
This article provides general guidance only and does not constitute legal or technical advice. Fire safety requirements vary depending on building type, use, and occupancy, and should always be assessed on a case-by-case basis by a competent fire risk assessor. Fletcher Risk Management Ltd accepts no liability for decisions made on the basis of this content.