Fire prevention plans: thermal cameras vs AI on existing CCTV

What the EA fire prevention plan guidance asks for

If your environmental permit requires a fire prevention plan (FPP), the Environment Agency guidance sets out what it must cover. Detection is one section of it, and it is written in terms of outcomes rather than products.

The guidance has three objectives: minimise the likelihood of a fire happening, aim for a fire to be extinguished within 4 hours, and minimise the spread of fire within the site and to neighbouring sites.^[1] Detection supports all three, because the earlier a fire is found, the smaller it is when someone responds.

On detection itself, the guidance says you must have procedures in place to detect a fire in its early stages, and you must show in your plan how the detection system will raise the alarm both during working hours and when the site is closed. The system must be proportionate to the nature and scale of your activities and the associated risks, and it can be automated or manual.^[1]

It then lists examples of appropriate automated systems: smoke and heat detectors including temperature probes, CCTV visual flame detection systems, and spark, infrared and ultraviolet detection. Whatever you use, its design, installation and maintenance must be covered by an appropriate third-party certification scheme such as UKAS, or meet an appropriate recognised standard such as a British Standard, and you must provide evidence of that certification in your plan. If you do not meet a recognised standard or accreditation, you must show you can still meet the three objectives.^[1]

Two practical points follow. First, both thermal monitoring and CCTV-based detection appear in the guidance, so the question is rarely which one is allowed; it is which one suits each area of your site. Second, the certification and evidence requirement applies to the system as a whole, so check what your chosen supplier can provide before you write it into the plan. The current guidance on GOV.UK shows it was last updated on 11 January 2021; check the publication page for any later changes before you submit.^[2]

Our fire prevention plan checklist goes through every section of the plan, not only detection.

What thermal cameras do well

A thermal camera measures the infrared energy coming off a surface and turns it into a temperature image. On a waste site, that means it can show a pile getting hotter than it should, often before there is any smoke to see.

That is its big strength. Many waste materials can self-heat: biodegradable waste, wood chip, compost-like material and fines can warm up inside a pile over days. A thermal camera pointed at the surface of a pile can pick up a hot spot as heat works its way out, and an alarm set on a temperature threshold can prompt someone to turn, break up or move the material before it ignites.

Thermal cameras also do not need light. They work the same at midnight as at midday, and they can see through light smoke that would hide a pile from a normal camera. For a defined area such as a deep bay, a baled store or the quarantine area, a thermal camera with temperature alarms gives clear, measurable monitoring that fits neatly into an FPP.

Their limits come from the same physics. A thermal camera only sees the surface in front of it, so heat deep inside a large pile may not show until late. Sun-warmed surfaces, hot exhausts and plant can look like hot spots, so thresholds and masking need care. And they are usually new, dedicated hardware, often mounted on masts with their own controller, so covering a whole yard takes many units.

What video AI on existing CCTV adds

Video AI watches the picture from the CCTV cameras you already have and looks for visible smoke and flame. When it finds them in an area you care about, it sends an alert with the clip.

Its strength is coverage. Most waste and recycling sites already have CCTV on tall poles for security, with wide views across stockpiles, bays, roads and buildings. Adding smoke and fire detection to those cameras covers large open areas without mounting new hardware for every view. It also watches the air above the piles, where smoke from a fire usually shows first, and the gaps between bays that a thermal camera aimed at one pile does not see.

The alert is also easy to act on. Every Woodcock AI alert arrives with the video clip and a plain-English description, so the person on call at night can see straight away whether it is smoke from a pile or steam from a vent. Alerts to a monitoring centre (ARC) and phone-call alerts are available as optional add-ons.

Woodcock AI lets you draw polygon detection areas round each pile or bay, so a camera alerts only on the areas that matter and ignores the road beyond the fence. A self-learning AI is fitted to each site and learns what is normal for each camera, and every detection has a feedback button that goes into retraining. You can set alert schedules per camera, and ask your cameras plain-English questions about past footage and download the matching clip.

Its limits are those of the camera. Video AI sees visible smoke and flame, not heat inside a pile, so it will not see self-heating before smoke appears. Thick fog, heavy rain and dirty lenses reduce what any camera can see, and blind spots behind buildings or tall stacks stay blind. That is why it belongs alongside heat monitoring and certified detection, not in place of them.

Thermal cameras vs video AI compared

The two methods look for different signs of a fire, so they are strongest in different places. This table compares them on the points that matter for an FPP.

This is a general comparison, not a test result. Performance on your site depends on the camera, the view, the material and the weather. For on-camera analytics as a third option, see video AI vs thermal vs on-camera analytics.

Why most sites layer thermal and video AI

A fire on a waste site can start inside a pile, at the surface, or from an outside source such as a hot load, a vehicle or a discarded battery. No single method sees all of those well, which is why layering makes sense.

A common pattern looks like this. Site management comes first: pile sizes, separation distances, stock rotation and a quarantine area, all set out in the FPP. On top of that sit heat monitoring for the piles most likely to self-heat, using thermal cameras or temperature probes. Then visual detection on existing CCTV covers the wider yard, the air above the piles, the gaps between bays, and the roads and buildings around them. At the top sit the certified alarm and response arrangements: who is alerted, how, and when the fire service is called.

Each layer covers a weakness in another. Thermal sees surface heat before smoke; video AI sees smoke rising from a pile the thermal camera is not pointed at. Thermal works in thick smoke; video AI gives a clip that shows what is actually happening. Both work at night, which matters because a significant number of waste site fires happen after working hours.^[3]

Layering also helps with the evidence your plan needs. A site plan that shows which camera or detector covers each pile, which ones are certified and who responds at each time of day is easier to explain to the Environment Agency, the fire and rescue service and your insurer. Our guide to what insurers expect from fire detection covers the insurer side.

Which method suits which part of a waste site

Rather than one choice for the whole site, work through each area and ask what is most likely to start a fire there and what would see it first.

• Deep bays and self-heating piles. Heat builds inside before smoke appears, so thermal monitoring or temperature probes earn their place. The guidance also asks you to check temperatures within bays.^[1] A CCTV view over the bay adds a visual check and a clip.
• Open yards and rows of piles. Wide areas with many piles are hard to cover with dedicated thermal views. Existing pole-mounted CCTV with video smoke and fire detection covers the yard and the air above it.
• The quarantine area. A defined spot where hot or suspect loads are placed. It suits a dedicated thermal or flame detector, with a camera giving the wider picture.
• Reception and tipping areas. Hot loads and lithium-ion batteries often arrive here. Video detection on the cameras watching the tipping floor can catch smoke from a load soon after it is tipped. See our guide to lithium-ion battery fires.
• Buildings and shredders. Indoor areas follow the building's own fire alarm design. Video AI can add early warning on cameras inside large open buildings, alongside the certified system.
• Perimeters and neighbours. The third FPP objective is about spread to neighbouring sites. Cameras along the boundary can watch for smoke from piles near the fence.

Detection when the site is closed

The FPP guidance asks how your detection raises the alarm both in working hours and when the site is closed.^[1] Out of hours is where many plans are thinnest.

During the day, people on site often notice smoke before any system does. At night and at weekends, the plan relies entirely on automated detection and on someone receiving and acting on the alarm. Fire and rescue services in England attended 256 industrial waste fires in the year ending December 2025, up from 183 in 2021, so the stakes are real.^[4] See our waste fire facts for the official figures.

For thermal systems, check where the temperature alarms go after hours and who responds. For video AI, decide who receives alerts at night and what they check. With Woodcock AI, you set alert schedules per camera, so smoke and fire detection can run around the clock while intrusion alerts run only when the site is closed. Alerts go by app, email or SMS with the clip. The out-of-hours site security checklist covers the wider picture.

How to layer thermal and video AI in your FPP

Seven steps take you from your current plan to a layered set-up you can explain to the Environment Agency, the fire service and your insurer.

1. 1

   Read the detection section of your FPP

   Find what your plan says about detection in working hours and when the site is closed, and which systems it names. Note any certification evidence it relies on.^[1]

2. 2

   Map your piles, bays and quarantine area

   Mark every stockpile, bay, baled store and the quarantine area on a site plan, with the material and the maximum pile size for each.

3. 3

   Add every camera and detector you already have

   Put your CCTV cameras, thermal cameras, temperature probes and any flame detectors on the same plan, with what each one can see.

4. 4

   Decide where heat monitoring matters most

   Piles prone to self-heating, deep bays and the quarantine area are the usual places for thermal cameras or temperature probes.

5. 5

   Use existing CCTV for the wide view

   Add video smoke and fire detection to the cameras that already overlook the yard, so the gaps between thermal views and the air above the piles are watched too.

6. 6

   Write down who gets each alert and when

   Set who receives alerts in working hours and when the site is closed, what they check first and when they call the fire service.^[1]

7. 7

   Keep the evidence together

   Hold the plan, camera register, certification evidence and alert log in one place for the EA, your fire risk assessment and your insurer, and review it after any change or near miss.

This guide is general information, not fire engineering, legal or insurance advice. Your permit, your regulator, your fire risk assessment and your insurer decide what applies to your site. It covers the Environment Agency guidance for England; Scotland, Wales and Northern Ireland have their own environmental regulators.^[5]

Sources

Regulatory guidance, law, statistics and industry guidance referred to on this page.

1. Environment Agency, Fire prevention plans: environmental permits (guidance, updated 11 January 2021). The three FPP objectives; procedures to detect a fire in its early stages; how the detection system raises the alarm in working hours and when the site is closed; detection proportionate to the risk; automated systems that may include smoke and heat detectors including temperature probes, CCTV visual flame detection systems, and spark, infrared and ultraviolet detection; third-party certification or a recognised standard; checking temperatures of waste in bays. Last checked 24 October 2026.
2. Environment Agency, Fire prevention plans: publication page and change history. The guidance and FPP template, with the history of revisions. Last checked 24 October 2026.
3. WISH, WASTE 28: Reducing fire risk at waste management sites (issue 3, March 2020). Good practice guidance written with the EA, HSE, NFCC and others. Notes that a significant number of waste site fires happen after working hours. Last checked 24 October 2026.
4. MHCLG, Number of industrial waste fires, England 2021 to 2025. Fire and rescue services in England attended 256 industrial waste fires in the year ending December 2025, up from 183 in 2021. Last checked 24 October 2026.
5. The Regulatory Reform (Fire Safety) Order 2005, article 13. Where necessary, premises must be equipped, to the extent that it is appropriate, with fire detectors and alarms. Last checked 24 October 2026.