Phoenix Journal · Extraction
Under UK fire safety law the "responsible person" is a legal role defined by control of the premises, not a job title. Here is what it means, and why it puts kitchen extract cleaning squarely on your desk.
Fire safety law explained
When a fire officer walks into a commercial kitchen after an incident, the first question is rarely about the flames - it is about who was in charge of preventing them.
That person has a name in law: the responsible person. It is one of the most misunderstood phrases in UK fire safety, partly because it sounds like a job title you could hand to someone and partly because so many people assume it means the landlord, the head chef or the fire risk assessor. In reality the responsible person is a legal role defined by the Regulatory Reform (Fire Safety) Order 2005 - the main fire safety law for non-domestic premises in England and Wales - and it attaches to control, not to a signature on a rota.
For anyone running a kitchen, the stakes are practical rather than academic. Grease-laden extract ductwork is one of the clearest fire risks on the premises, and the duty to manage it sits squarely with the responsible person. Understanding exactly what the phrase means, and what it obliges you to do, is the difference between a system that protects you and one that quietly builds a case against you. If you are still unsure whether the role lands on you, our guide on who is the responsible person for fire safety works through the ownership and control questions in detail.
What the duty actually requires
The Order does not leave "responsible" open to interpretation. It sets out a chain of specific, enforceable duties. Here is how they apply in a working kitchen, in the order they matter.
Why the definition bites in a kitchen
The reason the phrase "responsible person" carries so much weight is that liability follows it. If something goes wrong, it is the responsible person who stands in front of the enforcing authority, not the contractor who did the work and not the assessor who wrote the report. On conviction on indictment the penalty is an unlimited fine, and since the Sentencing Council's guideline for health and safety offences took effect in 2016, fines for serious fire safety failings have climbed sharply, particularly for larger organisations. Custodial sentences are available for the most serious breaches.
Kitchen extraction is where this principle is tested most often, because grease is both highly flammable and largely out of sight. A canopy can look clean while the horizontal duct runs above the ceiling carry a thick, hardened deposit that will readily ignite and carry fire through the building. The recognised benchmark for managing that risk is TR19® Grease, the specification published by the Building Engineering Services Association (BESA) in 2019 specifically for kitchen extract fire safety cleaning. It sets out how the whole system - from canopy to fan to the point of discharge - should be cleaned, verified and documented.
TR19® Grease also gives the responsible person something the Order demands but does not itself define: a defensible cleaning frequency. As a minimum, heavy-use kitchens running twelve to sixteen hours a day are expected to be cleaned roughly every three months; moderate use of six to twelve hours a day points to a six-monthly clean; and light use of two to six hours a day to an annual clean. Those are starting points to be refined by measuring actual grease deposition, not rigid rules - but they give you a rational, evidenced basis for the schedule your assessment relies on.
Competence matters just as much as frequency. Work carried out to the standard is expected to be delivered and signed off by technicians holding the BESA Grease Hygiene Technician qualification, and the sign-off should include pre- and post-clean photographs and a record of the deposit thickness removed. This is the paper trail that turns a claim of "we clean regularly" into evidence a fire officer or an insurer will accept.
The insurance dimension is where many operators feel the definition most keenly. A growing number of insurers now require evidence of cleaning to a recognised standard as a condition of cover for kitchen ventilation, and where a fire is traced back to inadequately maintained ductwork they may decline the claim. In that situation the responsible person is exposed twice: to the enforcing authority for the breach, and to an uninsured loss for the damage. Neither of those outcomes depends on whether the fire was "your fault" in an everyday sense - they depend on whether you can show you discharged the duties the law places on you.
The reassuring part is that the same actions satisfy all three audiences at once. A fire risk assessment that names the extract system, a maintenance schedule built on TR19® Grease frequencies, cleans carried out and certified by competent technicians, and a tidy set of records: that package answers the fire officer, satisfies the insurer and, most importantly, materially reduces the chance of a fire ever starting. Being the responsible person is not a burden to be delegated away - it is a role to be discharged well, with the right partners doing the specialist work.
The essentials
If you take three things from the meaning of "responsible person" under fire law, make it these.
Managing grease in the extract system is one of the clearest, most enforceable duties a kitchen responsible person holds - and one of the easiest to evidence well when the work is done to standard and properly certified.
Questions
It is whoever has control of the premises in connection with the business - usually the employer, but it can also be the owner, landlord, managing agent or occupier. More than one person can hold the role at once for different parts of a building. It is a legal position defined by control under the Regulatory Reform (Fire Safety) Order 2005, not a title you can simply assign to a member of staff.
No. You can and should appoint competent people to carry out specialist work such as extract cleaning, but the legal duty stays with the responsible person. If a fire is traced to poorly maintained ductwork, it is the responsible person who answers to the enforcing authority and the insurer, not the contractor. Appointing competent, properly qualified technicians is how you discharge the duty well - not how you transfer it.
Grease-laden ductwork is a recognised fire hazard, so it must be named in your fire risk assessment and kept in efficient working order under Article 17 of the Order. In practice that means a scheduled clean of the whole system to the TR19® Grease standard, carried out and certified by competent technicians. The resulting records are the evidence the law and most insurers now expect to see.
Phoenix Duct Clean · by the numbers
The right kit only helps if the system stays clean. Phoenix degreases canopies, filters and ductwork to TR19 Grease - UK-wide, overnight.