Fire Extinguisher Requirements for Trade Businesses — Vans, Sites and Premises (2026)

The Legal Backdrop

The core legislation is the Regulatory Reform (Fire Safety) Order 2005 — usually shortened to the Fire Safety Order, or FSO. It applies to virtually all non-domestic premises in England and Wales: workshops, yards, lock-ups, offices, units and shared buildings. Scotland has equivalent rules under the Fire (Scotland) Act 2005 and Northern Ireland under the Fire and Rescue Services (NI) Order 2006, and the practical requirements are broadly the same.

The Order makes someone the "responsible person" — in a trade business that's usually the owner or employer. The responsible person must carry out a fire risk assessment, act on what it finds, and provide "appropriate firefighting equipment" for the premises and for the safety of employees and anyone else who might be affected. There's no fixed national rulebook that says "you must have X extinguishers" — the requirement is risk-based. Your fire risk assessment is what determines how many extinguishers you need, of what type, and where they go.

That word "appropriate" matters. Putting a single water extinguisher in a workshop full of solvents, gas bottles and electrical equipment would not satisfy the Order, because water is the wrong — and potentially dangerous — agent for those risks. Matching the extinguisher to the hazard is the whole point.

Fire Classes and the Right Extinguisher for Each

Fires are grouped into classes by what's burning, and each class needs a particular type of extinguishing agent. Use the wrong one and you can make things worse — spreading burning liquid, conducting electricity back to yourself, or causing a violent reaction. In the UK all modern extinguisher bodies are red, with a coloured band or panel showing the agent inside. Here's how the classes break down.

• Class A — solids: wood, paper, card, textiles, most plastics. Use water, water mist or foam. This is the bread-and-butter fire on most sites.
• Class B — flammable liquids: petrol, diesel, white spirit, paints, thinners, adhesives. Use foam, CO2 or dry powder. Never use water — it spreads the burning liquid.
• Class C — flammable gases: propane, butane, acetylene, LPG. Use dry powder, but the priority is to isolate the gas supply first; tackling a gas fire while it's still feeding is dangerous.
• Class D — metals: magnesium, aluminium swarf, lithium, titanium. Needs specialist (M28 or L2) powder applied with the correct technique. Standard extinguishers will not safely deal with a metal fire.
• Electrical fires: not a numbered class, but a critical category. Use CO2 (or a dielectrically tested powder). Never use water or foam on live electrical equipment — it conducts and can electrocute you.
• Class F — cooking oils and fats: deep-fat fryers, large quantities of cooking oil. Use a wet chemical extinguisher, which saponifies the oil and smothers it. Relevant if you fit out kitchens or have a canteen.

Two combinations cover most trade premises and vans: a foam (or water) extinguisher for general Class A/B risks plus a CO2 for electrical and liquid risks. Dry powder is a versatile all-rounder for outdoor and vehicle use, but it's messy indoors, reduces visibility and can damage electronics, so it's less ideal for an office or a tidy workshop.

Quick Reference: Fire Class vs Extinguisher Type

Remember: every extinguisher body is red. The band or panel of colour is what tells you the agent. A common, dangerous mistake is reaching for the wrong one in a panic — which is why labelling, signage and a quick word during induction all matter.

Vans, Vehicles and Tools

There is no general legal duty in the UK for a private van or car to carry a fire extinguisher — unlike some European countries. So strictly speaking, the law does not force a sole trader's van to have one. But that is rarely the end of the story for a working trade vehicle.

The moment you do hot works — angle grinding, disc cutting, soldering, brazing, hot-air paint stripping, bitumen boiling or torch-on roofing — you are creating an ignition source, and your risk assessment will almost always require an extinguisher to hand plus a fire watch. Most main contractors and site rules enforce this through a hot works permit: before you strike a flame you sign a permit confirming you have the right extinguisher present, you've cleared combustibles from the area, and someone keeps watch during the work and for a set period afterwards (commonly 60 minutes) to catch smouldering ignition.

For that reason most trades carry an extinguisher in the van as standard. A dry powder unit is popular because it copes with Class A, B and C and works outdoors; a CO2 is the safer choice around live electrics and engines. A 2kg CO2 or a 1–2kg powder is a sensible van size. So while the van itself isn't legally obliged to carry one, your hot-works risk assessments, your insurer and the sites you work on usually make it a practical requirement — and not having one to hand can put you in breach of a permit and a contract even if not of the law.

• Keep the van extinguisher secured and accessible, not buried under tools.
• Take it to the work position for hot works — an extinguisher locked in the van 30m away is no use.
• Check the gauge before every job and note the annual service date.

Premises Basics — How Many and Where

For fixed premises — a workshop, unit, yard office or storage building — the standard reference is BS 5306-8, which sits behind most fire risk assessments. The general principles are straightforward.

• Travel distance: no one should have to travel more than about 30 metres to reach a Class A extinguisher. For higher-risk areas (flammable liquids, hot works bays) that distance drops, typically to around 10m.
• Coverage: as a rough planning figure, provide enough Class A cover for the floor area — many assessors work to roughly 2 extinguishers per floor as a starting point for a small unit, then adjust for risk. The assessment, not a formula, sets the final number.
• Location: mount extinguishers on escape routes, near exits and at the foot of stairwells, so people move towards the way out as they collect one.
• Mounting height: mount on a stand or bracket with the handle around 1m from the floor for heavier units and up to about 1.5m for lighter ones, so they're easy to lift without bending or over-reaching.
• Signage: a clear, compliant ID sign above each extinguisher so it can be found in smoke, plus signs stating which type it is.
• Unobstructed: keep the area in front clear at all times — no stock, no pallets, no parked plant in the way.

Maintenance — Keeping Them Legal and Working

An extinguisher that doesn't work is worse than useless — it gives false confidence. Maintenance is a legal expectation under the Fire Safety Order and follows BS 5306-3, the standard for commissioning and maintenance. There are three layers.

Monthly visual check (by you)

The user — that's you or a nominated person — should give each extinguisher a quick visual check monthly: it's in its place, the pressure gauge (where fitted) is in the green, the pin and tamper seal are intact, the hose and nozzle are clear, and there's no obvious damage or corrosion. Record it. It takes a couple of minutes and catches the obvious problems.

Annual basic service (by a competent person)

Once a year every extinguisher must have a "basic service" carried out by a competent person — in practice a third-party-certificated fire equipment engineer. They inspect, weigh, check the pressure and mechanism, and apply a service label. This annual service is what most insurers and inspectors look for, so keep the certificates.

Extended service and discharge test

On a longer cycle the engineer carries out an extended service, which involves discharging and recharging the extinguisher to confirm it actually works internally. Under BS 5306-3 this is generally every 5 years for water, foam, powder and wet chemical units. CO2 extinguishers instead undergo a 10-yearly overhaul and pressure test (they're handled differently because they're high-pressure gas cylinders).

Most extinguishers also have a practical working life of around 5 to 10 years depending on type and condition; many engineers and insurers treat five years as the point to plan replacement of stored-pressure units, or sooner if there's corrosion or damage. Budget for replacement rather than being surprised by it.

Why It Matters

Beyond the obvious — that a working extinguisher can stop a small fire becoming a catastrophe — there are three reasons to take this seriously.

• Enforcement: the fire and rescue service enforces the Fire Safety Order. They can issue informal advice, enforcement notices, prohibition notices (which can shut premises) and, for serious breaches, unlimited fines and even imprisonment. Failing to provide appropriate firefighting equipment is a clear breach.
• Insurance: business insurers routinely require an up-to-date fire risk assessment and serviced extinguishers as a condition of cover. A fire claim can be reduced or refused if you can't show the equipment was present and maintained — especially around hot works, which is a leading cause of commercial fire claims.
• Liability on site: if your hot works start a fire on a client's property or a main contractor's site, you may be liable for the damage. A signed hot works permit, a fire watch and the right extinguisher to hand are your evidence that you worked safely.

All of this flows from one document: your fire risk assessment. If you don't have a current one for your premises, that's the first thing to fix — it's a legal requirement in its own right, and it's what tells you exactly what extinguishers you need rather than guessing.

Practical Tips for a Trade Business

• Get a fire risk assessment done for any premises you occupy, and keep it under review — it drives every other decision here.
• Standardise your kit: a foam or water unit plus a CO2 covers most workshops; a powder or CO2 in each van covers hot works on site.
• Use hot works permits even on your own jobs, not just where a main contractor insists — they prove diligence and structure the fire watch.
• Diarise the annual service for every extinguisher and store the certificates with your insurance paperwork. Note 5-year extended service and 10-year CO2 dates too.
• Train your team on which extinguisher is which — particularly "never water on electrics or liquids" — and on raising the alarm and getting out first.
• Replace, don't nurse, old units — corrosion, a dropped pressure gauge or a perished hose means it's time for a new one.
• Keep access clear in the yard and workshop; an extinguisher behind a stack of materials might as well not be there.