Before we start: British Standards are codes of practice, sold by BSI and not free to read, so this guide summarises them from public sources rather than quoting them. Editions change - BS 5839-1 and BS 5266-1 were both revised in 2025. Always work from your own copy of the current standard, the manufacturer's instructions and the client's fire risk assessment.

The legal duty: who is responsible?

In England and Wales, the main law is the Regulatory Reform (Fire Safety) Order 2005 (often called the Fire Safety Order). It puts the duty on the responsible person - usually the employer, or whoever controls the premises, such as the owner, landlord or managing agent.

Article 17 says that, where necessary to keep people safe, the responsible person must make sure fire safety facilities, equipment and devices are "subject to a suitable system of maintenance" and kept "in efficient working order and in good repair". That covers fire alarms and emergency lighting.

The law itself doesn't say "service every six months". It sets the duty, and the British Standards are the recognised way of showing how you met it. Government guidance, such as the GOV.UK fire safety risk assessment guide for offices and shops, points to weekly alarm tests, a competent person maintaining the system, and keeping a logbook of all maintenance and testing.

As the maintainer you're usually not the responsible person - but your records are often the first thing a fire officer, insurer or auditor asks to see.

Other rules worth knowing

  • Recording the fire risk assessment. Since 1 October 2023, section 156 of the Building Safety Act 2022 requires all responsible persons in England and Wales to record their full fire risk assessment and fire safety arrangements.
  • High-rise residential buildings in England. Under regulation 7 of the Fire Safety (England) Regulations 2022, the responsible person for a residential building at least 18 metres high or seven storeys must carry out monthly routine checks of essential fire-fighting equipment. That includes fire detection and alarm systems and evacuation alert systems in the common parts. Faults not fixed within 24 hours must be reported to the fire and rescue service, and records kept.
  • Scotland and Northern Ireland have their own fire safety law (in Scotland, the Fire (Scotland) Act 2005). Check the local framework if you work there.

BS 5839-1: weekly tests and periodic servicing

BS 5839-1 is the code of practice for fire detection and fire alarm systems in non-domestic premises. The current edition is BS 5839-1:2025, which replaced the 2017 edition in 2025. It's a code of practice, not law - but it's what fire officers, insurers and certification bodies expect, and any variations should be agreed and recorded.

Weekly user test

BS 5839-1 recommends that the user - the responsible person or someone they appoint - tests the system every week. In practice that means operating a manual call point with a test key, checking the panel receives the signal and the sounders work, then resetting. GOV.UK guidance adds that a different call point should be used each week, so that over time every call point gets tested, and that testing at the same time each week is good practice. Each test, and which call point was used, goes in the logbook.

The weekly test is the client's job, but check the logbook at every visit - gaps are common.

Periodic inspection and servicing

BS 5839-1 recommends that the system is inspected and serviced by a competent person at intervals set by risk assessment, and that the gap between visits should not exceed six months. The Fire Industry Association notes that if this isn't followed, the system should be treated as no longer compliant with BS 5839.

The 2025 edition added some flexibility. As the IET's Wiring Matters summary explains, six-monthly servicing is still the expectation, but a visit can now take place anywhere from five to seven months after the last one without the system being treated as non-compliant. That helps when access falls through - it isn't licence to drift to seven months every time.

Annual coverage of every device

So "is an annual fire alarm service enough?" - for a BS 5839-1 system, no. Where the annual figure comes in is device testing: the FIA explains that every manual call point, detector and sounder should have its operation checked over each twelve-month period. That work can be split across the service visits - for example, half the devices at each six-monthly visit - as long as nothing is missed. Your records need to show which devices were tested when.

BS 5839-6: fire alarms in homes, HMOs and flats

BS 5839-6 covers fire detection and alarm systems in domestic premises, including houses in multiple occupation (HMOs) and sheltered housing. It uses "grades" of system, from simple mains-powered smoke alarms with a battery backup up to full panel-based systems (Grade A) in larger premises.

The routine depends on the grade. Local council HMO guidance, such as Oxford City Council's, typically expects simpler smoke alarm systems to be tested regularly using the test button, and Grade A systems to be tested weekly and serviced every six months by a competent engineer, in a similar way to BS 5839-1. Guidance varies, so check the standard, the fire risk assessment and any HMO licence conditions.

Emergency lighting: BS 5266-1 monthly and annual tests

Emergency lighting is covered by BS 5266-1 (the UK code of practice) alongside BS EN 50172, which deals with emergency escape lighting systems including testing. Both have been revised recently - BS 5266-1:2025 took effect in October 2025 and BS EN 50172 was republished in 2024.

The core routine that GOV.UK guidance and fire services describe is well established:

Check How often What it involves
Visual check Daily Where practicable, check that units look in good repair and that any central battery or control panel shows normal operation.
Functional test Monthly Simulate a mains failure (usually with a test key switch) for a short time, and check every luminaire and sign lights from its battery.
Full-duration test Annual Run the system on battery for its full rated duration - commonly three hours - and check it is still lit at the end.

Two practical points on the annual test. First, batteries take time to recharge afterwards - the GOV.UK guide says typically 24 hours - so plan it for a quiet period or make other arrangements until the system is back up. Second, recent revisions added further checks, including periodic verification of the system's light levels; trade summaries also report an extra twice-yearly visual check of luminaires in BS EN 50172:2024. We haven't been able to confirm that detail against the standard itself, so check your copy before building it into contracts.

Self-testing systems reduce manual work, but someone still needs to review the results and act on faults.

Logbooks, records and certificates

The logbook

Both standards expect a logbook kept on the premises, and the IET notes that BS 5839-1:2025 accepts logbooks in digital or paper form. A fire alarm logbook should record:

  • Weekly tests - date, time, call point used and who did it.
  • Service visits - date, engineer, company and what was found.
  • Faults and false alarms, with the cause where known and what was done.
  • Periods when the system, or part of it, was disabled.
  • Alterations, extensions and any agreed variations from the standard.

An emergency lighting logbook records the monthly and annual tests, any failures found, and the date each was put right.

Certificates

BS 5839-1 includes model certificates for each stage of a system's life - design, installation, commissioning, acceptance, servicing and modification. BS 5266-1 has its own model certificates for emergency lighting, including for completion and periodic inspection. Certificates are issued by the competent person who did the work, through their own certification process - typically their certification body's documents or certification software.

Third-party certification: BAFE and NSI

There's no single licence to service fire alarms in the UK, but many clients, insurers and tenders ask for third-party certification - an independent body checking that your company is competent to work to the standard.

  • BAFE SP203-1 is the scheme for fire detection and alarm companies. It is split into modules - design, installation, commissioning and handover, and maintenance - so a firm can hold only the ones it does. Several UKAS-accredited certification bodies assess firms against it.
  • NSI is one of the certification bodies offering BAFE SP203-1, with its own Gold approval that adds a quality management system to ISO 9001.
  • The FIA also mentions LPS 1014, run by LPCB, as another recognised certificate of competence.

Clients can check a BAFE-registered company on the BAFE register. Either way, certified firms are expected to keep consistent, auditable records.

What to evidence for each client

  • The servicing certificate for every visit, with the date and the engineer.
  • Which devices were tested on each visit, so annual coverage of every device can be proven.
  • Defects found, what you recommended, and whether the client approved the remedial work.
  • Photos of faults, panel status and anything you couldn't access.
  • The engineer's competence - training records, certification and cards in date.

A fire alarm service-visit checklist

Every system and contract is different, and the standard and manufacturer's instructions come first. As a starting point, a typical visit covers:

  • Sign in, tell the site contact what you're doing, and arrange for the alarm receiving centre to be put on test where the system is monitored.
  • Review the logbook - weekly tests done, false alarms, faults and disablements since the last visit.
  • Check the zone plan is displayed and still matches the building.
  • Inspect the panel: indications, fault and event log, and that the time and date are correct.
  • Check standby batteries and the charger, and note battery dates.
  • Test your planned share of detectors, call points and sounders for this visit, and record which ones.
  • Test links to other systems - door releases, plant shutdown, alarm monitoring - as set out in the cause-and-effect.
  • Look for building changes (new walls, change of use, blocked detectors) that affect coverage.
  • Record every defect, with photos, and give the client written recommendations.
  • Return the system to normal, take the monitoring off test, and fill in the logbook.
  • Issue the servicing certificate and book the next visit within the agreed interval.

Common mistakes

  • Annual servicing contracts. Selling or accepting a once-a-year visit for a BS 5839-1 system.
  • Visits that drift. Six months becomes eight because nobody booked the next one. The 2025 window stops at seven.
  • No record of which devices were tested. Without it you can't prove every device was covered in the year.
  • Weekly tests on the same call point. The logbook shows tests, but always on the one nearest reception.
  • Forgetting emergency lighting. Monthly tests left to the client with nobody checking, or the annual full-duration test skipped.
  • Defects that go nowhere. Faults written on the service sheet but never quoted, approved or fixed.

Managing recurring servicing across many client sites

One system is easy. Two hundred sites on six-monthly alarm visits and annual lighting tests is where spreadsheets fall over. A few habits help:

  • Treat each visit as a recurring task tied to the site, not a date in someone's diary. When one visit is completed, the next should be created automatically.
  • Get a warning a few weeks before each visit is due, so access can be arranged.
  • Make overdue visits impossible to miss. A red list beats remembering.
  • Use the same checklist every time for each system type, so every engineer records the same things.
  • Keep everything for a site in one place - checklists, photos, certificates, defects - so you can answer any client or auditor question in minutes.

How software helps

DuoApp is job and team management software with a setup built for UK fire and security firms. It doesn't replace your certification process - it runs the work around it:

  • Recurring service visits. Set up each contract as tasks that repeat six-monthly, monthly, yearly or at any custom interval. The next visit appears when the last is completed, or a set number of days before it's due, and overdue ones are highlighted. See projects & tasks.
  • Service checklists on the phone. Build a checklist for each system type with pass / fail / N/A checks, photos and signatures. Records are timestamped with a full audit trail, and it works offline in basements. See quality control.
  • Engineer competence in date. Store training certificates, cards and insurance against each engineer with expiry dates and warnings, and optionally block work for anyone whose documents aren't current. See document compliance.
  • Remedials that get approved. Raise a quote or variation for defects found on a visit and send it for approval, with an audit trail of who agreed what. See smart approvals.
  • Clients see their own records. Add facilities managers or responsible persons as users who see only their own sites, at the same £10 per user.

To be clear: DuoApp does not produce BS 5839 or BS 5266 certificates, and it doesn't keep an asset register of devices. Most firms keep producing certificates through their certification body or existing software and attach the PDF to the visit, so everything for a site sits together. More on how it works for your trade on our fire & security software page.

It costs £10 per user per month with every feature included, on iOS, Android, desktop and browser, with a 14-day free trial and free onboarding with a real person.

Frequently asked questions

How often should a fire alarm be serviced in the UK?

For non-domestic premises, BS 5839-1 recommends inspection and servicing by a competent person at intervals set by risk assessment, and no more than six months apart. The 2025 edition allows each visit to fall between five and seven months after the last. The system should also be tested by the user every week.

Is an annual fire alarm service enough?

Not for a system covered by BS 5839-1. The annual figure relates to device testing - every call point, detector and sounder should be checked over each twelve-month period, which can be split across the six-monthly service visits.

Who should do the weekly fire alarm test?

The responsible person or someone they appoint, such as a caretaker or office manager. It usually means operating a different manual call point each week with a test key, checking the alarm sounds, resetting the panel and recording the test in the logbook.

How often should emergency lighting be tested?

The established routine is a short functional test every month, simulating a mains failure, and a full rated-duration test once a year, commonly three hours. BS 5266-1 and BS EN 50172 were revised in 2024 and 2025, so check the current editions for any further checks.

Can a fire alarm logbook be digital?

Yes. BS 5839-1:2025 states that logbooks may be in digital or paper form. Whichever you use, it should record weekly tests, service visits, faults, false alarms, disablements and alterations, and be available on site when needed.

Does a fire alarm company need BAFE certification?

There is no single legal licence, but many clients, insurers and tenders ask for third-party certification such as BAFE SP203-1, which can be obtained through certification bodies including NSI. It shows a firm's competence has been independently assessed.

A reminder: this guide is general information, not legal advice. Last checked October 2026. Standards and regulations change, so confirm current requirements with the latest British Standards, the GOV.UK guidance, your certification body or a competent fire safety adviser.