Trolleys Kept Hitting the Call Points: Fixing False Fire Alarms at a Kent Hospital

At Syndicate Fire Protection Service, we maintain the Fire Alarm System at a private hospital in Kent. During one of our regular visits, the hospital's team raised an odd, recurring problem. Large trolleys moving through the corridors kept clipping the manual call points fixed to the wall - the break-glass devices staff use to raise a Fire Alarm by hand - striking them at exactly the wrong height, every time and setting off an unwanted alarm. Not a fault. Not a fire. Nothing changed about the trolley. Nothing changed about the call point... just where the two of them met.

It's the kind of fault most contractors would shrug off. Fit a plastic cover over the call point. Note it on the service sheet. Move on. Instead, our engineers looked at the actual geometry of the problem: the trolleys were a fixed height, the call points were a fixed height and the two kept meeting in the same spot. So we repositioned the call points - moved them upward, clear of the trolleys - within the tolerance BS 5839-1 (the British Standard covering Fire Alarm System design, installation and servicing intervals) allows. No cover. No workaround. No chargeable revisit. No fuss. The trolleys still pass several times a day. They just clear the call points now.

A known problem, not a one-off

Trolleys catching call points isn't a quirk unique to one hospital corridor. Industry guidance from the Fire Industry Association (FIA) explicitly names trolleys and hospital beds among the recognised causes of accidental call point activation by impact. The same guidance formally categorises vehicular contact - from push-along trolleys to forklift trucks - as one of the recognised causes of impact-activated false alarms.

Call points aren't tucked away in quiet corners, either. BS 5839-1 requires them at storey exits and exits to open air on escape routes - exactly the corridor traffic routes where trolleys and beds move all day, every day, in a working hospital.

What BS 5839-1 actually allows

BS 5839-1 says manual call points should sit 1.4m above the floor, somewhere accessible, well lit, and impossible to miss - not buried behind something or tucked in a dark corner. That figure isn't a precise engineering calculation; it's a round number that's become the accepted norm over time. But it isn't rigid, either.

BS 5839-1:2025 - the current edition - sets a defined tolerance around that 1.4m figure. According to the Fire Industry Association's guide to the changes in BS 5839-1:2025, the mounting height can sit up to 200mm higher or 300mm lower than the nominal 1.4m without being treated as a significant deviation or logged as a formal variation. In practice, that gives a competent engineer real room to move a call point clear of a known obstruction - in this case, a hospital trolley. Our engineers moved the call points upward, within that 200mm allowance, without stepping outside the standard and without logging an official deviation.

The measurement itself is precise, even though the tolerance around it is forgiving. The 1.4m figure is taken to the centre of the frangible element - the break-glass or actuator - not the edge of the housing. Where a call point is viewed from the side, as in a corridor, the standard also allows it to be surface-mounted or no more than semi-recessed (partly set into the wall rather than flush), with the front face proud of the wall by at least 15mm (standing slightly forward of the wall surface, so it's easy to spot and reach).

None of this is complicated.

It just takes someone who knows exactly where the standard's flexibility sits and where it doesn't.

This is general guidance on what the standard permits, not a substitute for your own Fire Risk Assessment or advice from a competent fire engineer on your specific building.

Why we didn't just fit covers

Covers are the industry's usual answer to exactly this scenario. The FIA's own 2017 guidance names hospital trolleys banging into call points as one of the specific problems behind the standard's recommendation that all call points be fitted with covers. It's not a bad default. Research by the FIA and the Scottish Fire and Rescue Service, reported in 2016 and folded into the 2017 revision of BS 5839-1, found manual call point activation responsible for 12% of all false alarms surveyed and estimated that fitting protective covers could cut false alarms by 16%.

Fitting a cover doesn't stop the trolley hitting the call point - it just adds a barrier the person raising the alarm has to get through first. Our engineers preferred to fix the actual cause: move the call point out of the trolley's path altogether. Same protection for the hospital, without corridors filling up with plastic covers and without asking staff to press any harder.

The cost of getting this wrong

False alarms aren't a minor irritation. They're the single largest category of incident that fire and rescue services attend. Home Office figures for the year ending December 2025 show fire and rescue services in England attended 252,162 false alarms - 39% of all incidents attended. Home Office trend data shows false alarms fell sharply from the early 2000s to 2018, driven mainly by reductions in automatic Fire Alarm-related callouts, but the decline has since plateaued, with false alarms consistently making up 40 - 44% of all incidents attended.

Hospitals feel this particular problem more than most workplaces do. Trade body FIA, citing NHS Digital data, reported that Dartford and Gravesham NHS Trust in Kent recorded a false Fire Alarm roughly every fortnight in 2017 - 18 - a 26% rise over five years. That local trend tracked a national one: NHS trust false-alarm callouts were up 8% that year and NHS false alarm incidents had risen 12% over the preceding five years. Every one of those alarms means an evacuation, a fire service attendance or both. Patients moved. Procedures interrupted. Staff pulled away from care. All for a fault that a fixed call point height was causing all along.

NHS England's own Fire Safety guidance treats this as significant enough to warrant dedicated coverage. Its Health Technical Memorandum 05-03 now folds the management of false and unwanted Fire Alarms into a revised Part B (Fire Detection and alarm systems), last updated in March 2024. That matters more in a hospital than almost anywhere else. A ward can't evacuate the way an office floor can. Patients mid-procedure, on monitoring equipment or simply not mobile enough to move quickly all add a layer of disruption a false alarm in a warehouse never has to contend with - which is exactly why fixing the cause, not just muffling the symptom, was worth the extra care.

The proactive fix over the easy one

This is what the personal touch actually looks like in practice. The hospital didn't have to raise this problem twice and we didn't send it back with a quote for a separate job. An engineer who already knew the building from regular BS 5839-1 maintenance visits looked at the real cause, checked it against the standard and fixed it there and then.

We're BAFE SP203-1 registered and third-party certified by SSAIB, for Fire Detection and alarm system maintenance - nothing wider than that. It's why we're used to being asked why something's sited the way it is, and we'd rather explain the answer in plain terms than hide behind a spec sheet. Moving the call point instead of just covering it is exactly that kind of answer: British Standards are our floor, not our ceiling. Where the standard gives room to do the better job, we take it.

It's a small job, but it's exactly the kind of thing a Syndicate Fire engineer is trained to catch - and fix - without needing to come back for it.

FAQs

Where must manual call points be positioned under BS 5839-1?

BS 5839-1 requires manual call points to be located at storey exits and exits to open air along escape routes, mounted at 1.4m above finished floor level, in positions that are accessible, well-illuminated and free from obstruction. The measurement is taken to the centre of the frangible element, not the edge of the housing and call points can be surface-mounted or semi-recessed provided the front face stands at least 15mm proud of the wall. These are corridor and doorway locations by design, which is exactly where trolleys, beds and other wheeled equipment travel throughout the day. Reviewing where call points actually sit against day-to-day traffic patterns is part of what we check on every maintenance visit.

Does BS 5839-1 allow any flexibility in call point mounting height?

Yes. BS 5839-1:2025 - the current edition of the standard - sets a defined tolerance around the standard 1.4m mounting height: up to 200mm higher or 300mm lower need not be treated as significant and doesn't have to be logged as a formal variation. That gives a competent engineer genuine scope to move a call point clear of a known obstruction - a doorway pinch point, say or a route used by wheeled equipment - without stepping outside the standard. It's a defined margin, which is why we treat it as something for a qualified engineer to assess, not a DIY adjustment.

What typically causes manual call points to trigger false alarms?

Industry guidance from the Fire Industry Association identifies impact as one of the recognised causes of accidental call point activation, specifically naming trolleys, hospital beds and vehicles such as forklift trucks. Because call points sit at door height on escape routes, they occupy the same space as wheeled equipment moving through corridors and repeated contact at the wrong height can set off an alarm with no fault and no fire involved. Research behind the 2017 revision of BS 5839-1 found manual call points responsible for 12% of all false alarms surveyed. It's a genuinely common problem and one worth checking for at review rather than dismissing as a one-off nuisance.

How significant is the false alarm problem for fire and rescue services?

Home Office figures for the year ending December 2025 show fire and rescue services in England attended 252,162 false alarms - 39% of all incidents attended that year. False alarms fell steadily from the early 2000s to 2018, mainly due to fewer automatic Fire Alarm call-outs, but the decline has since plateaued, with false alarms now consistently making up 40 - 44% of all incidents attended nationally. Each attendance carries a real cost: crews diverted from genuine emergencies and for premises with vulnerable occupants, disruption that goes well beyond a false alarm elsewhere. That's the scale of the problem behind what looks, on the ground, like a single nuisance alarm.

What are a Responsible Person's obligations if false alarms keep recurring?

Under the Regulatory Reform (Fire Safety) Order 2005, the Responsible Person (the person or organisation legally responsible for Fire Safety in a building) has an ongoing duty to keep Fire Safety equipment properly maintained and a recurring fault - including repeated false activations - is exactly the kind of issue a Fire Risk Assessment should pick up and require action on. A pattern of false alarms from the same call point or area usually points to a fixable cause rather than a device fault and BS 5839-1 gives engineers room to address it within the standard's tolerances. Our engineers flag exactly this kind of recurring pattern during scheduled maintenance, rather than waiting for it to be raised as a complaint.

Are protective covers required on manual call points?

BS 5839-1 recommends that all manual call points be fitted with protective covers, following research by the FIA and Scottish Fire and Rescue Service that found covers could cut false alarms by around 16%. Covers are a sound, standard-recommended safeguard against accidental knocks and impacts. But a cover reduces the chance of accidental triggering without addressing why a call point is being struck in the first place - if trolleys or other equipment routinely make contact at the same spot, the underlying geometry is still a factor day to day. Where the standard allows it, we'll look at whether repositioning solves the root cause before defaulting to a cover.

If you're the Responsible Person (the person or organisation legally responsible for Fire Safety in a building) for a site where trolleys, beds or forklifts share corridors with call points, it's worth having someone look at the geometry before reaching for a box of covers. Find out more about how we design, install and maintain Fire Alarm Systems across Kent and London, or get in touch - or call us on 01843 265 389 - and we'll take a look at the geometry before you reach for a box of covers.