In the current UK retail landscape, the risk profile for independent jewellers and watch specialists has shifted. Specialist insurers, including Hiscox, T H March, Aviva Specie, Lockton, and AXA Art, have responded by tightening the requirements for "Active Security" within Jewellers' Block policies.
For many years, security was categorised as a series of physical barriers. In 2026, the industry standard has moved towards intervention. Insurers no longer view a standard intruder alarm as sufficient for high-value stock. They now mandate systems that can actively impede a crime in progress.
Understanding the distinction between passive and active systems is no longer a matter of choice; it is a jewellery shop security fog systems requirement that determines whether a claim will be paid in the event of a loss.
The Evolution of Jewellers' Block Requirements
A Jewellers' Block policy is a comprehensive form of insurance designed specifically for the jewellery trade. It covers stock, cash, and equipment against various risks, including theft, robbery, and smash-and-grab raids.
Historically, insurers focused on:
- Physical Security: Safes with specific cash ratings, laminated glass, and steel shutters.
- Electronic Monitoring: Grade 3 or 4 intruder alarms and CCTV.
However, data from NaVCIS and SaferGems highlights a critical flaw: traditional systems are "passive." They record the event or notify the police, but they do not stop the intruder from removing stock. In a smash-and-grab scenario, which typically lasts less than 60 seconds, the "Response Time Gap" is too wide for police or key-holders to arrive before the perpetrators have fled.
The Shift to "Active Security"
In 2026, major insurers are increasingly inserting "Conditions Precedent" into policies. These clauses state that the insurer is only liable if specific active security measures are functional and engaged at the time of the loss.
"Active Security" refers to technology that creates a physical or sensory barrier to stop a crime. The primary example is security fogging.
Passive vs. Active Security: The Technical Distinction
To remain compliant with a modern Jewellers' Block policy, retailers must understand the technical differences between these two categories.
Passive Security (The Alert)
Passive systems are designed to detect and report.
- Alarms: Trigger a siren and notify a Monitoring Station (ARC).
- CCTV: Records footage for post-event investigation.
- Glazing: Slows down entry but does not prevent it.
The limitation is that passive systems do not change the environment to protect the assets. If an intruder breaks a window, the alarm sounds, but the stock remains visible and accessible.
Active Security (The Intervention)
Active systems are designed to interfere with the intruder's ability to complete the theft.
- Security Fogging: Instantly fills the premises with a dense, food-grade fog that reduces visibility to near zero.
- Verified Response: Systems that allow for immediate, automated intervention.
By deploying fog, you remove the intruder's primary tool: vision. Without visibility, they cannot locate display cabinets, safes, or exit points.
Insurer Mandates: Hiscox, T H March, and the London Market
Specialist brokers like T H March and Lockton often negotiate terms based on the specific risks of the premises. However, for stores located in high-risk zones such as Hatton Garden or the Birmingham Jewellery Quarter, or those stocking high-demand brands like Rolex, Patek Philippe, or Audemars Piguet, active fogging is now frequently a non-negotiable term.
Key Insurer Requirements in 2026:
- NSI or SSAIB Approval: The entire security installation, including the fog system, must be installed by a company certified by the National Security Inspectorate (NSI) or the Security Systems and Alarms Inspection Board (SSAIB).
- EN 50131-8 Compliance: This is the specific European Standard for security fogging devices. Insurers require systems that meet this standard to ensure the fog is dense enough to be effective and safe for retail environments.
- Dual-Path Monitoring: Alarms must have dual-path signalling (e.g., IP and GSM) to ensure the signal reaches the ARC even if phone lines are cut.
- Instant Deployment: The fog must reach full density within seconds of a verified trigger to mitigate smash-and-grab risks.
Density® Fog Systems: Meeting the Standard
Density® manufactures systems specifically engineered to meet these insurer mandates. Our products are designed for integration with existing NSI and SSAIB-approved alarm systems.
Cabinet Protection: The UNIK Fog System
For independent jewellers, the UNIK fog system provides targeted protection for high-value window displays and watch cabinets.
- Form Factor: The smallest unit on the market, allowing for discreet installation within or above display cases.
- Battery Power: Operates for 6+ months on battery, ensuring protection even if the mains power is cut: a common tactic in professional raids.
- Precision: Targeted deployment protects the most vulnerable assets without needing to fill the entire store if only a specific zone is breached.
Shop Floor Coverage: The HP and Lite Lines
For larger showrooms and multi-store rollouts, the Lite fog systems or Basic fog systems provide high-volume coverage. These units can fill up to 1500 m³ in seconds, providing a total-room blackout that forces intruders to retreat.
The Risk of Non-Compliance
In 2026, the concept of "Active Security" is often tied to a Warranty or Condition Precedent. If your policy states that an active fogging system must be in place and maintained, and a theft occurs while the system is disabled or depleted, your insurer may legally decline the claim.
Common compliance failures include:
- Empty Fluid Canisters: Failure to replace fluid after a deployment or test.
- Uncertified Installation: Using a general electrician rather than an NSI/SSAIB-approved security professional.
- Lack of Integration: A fog system that is not correctly linked to the alarm, causing a delay in deployment.
Density® cloud and server management options allow multi-site operators to monitor the status of every unit in real-time, ensuring that fluid levels, battery health, and system readiness are always within compliance parameters.
Implementation and Certifications
When upgrading your security to meet Jewellers' Block requirements, the process should follow a strict technical path:
- Site Survey: Assess the volume (m³) of the area to be protected.
- Product Selection: Choose between the UNIK (for cabinets) or the HP/Lite range (for floor space).
- Integration: Connect the Density® unit to an NSI-approved alarm panel (e.g., HKC).
- Certification: Ensure your installer provides a certificate of compliance for the EN 50131-8 standard.
Conclusion: Securing Your Assets and Your Policy
In the current environment, passive security is no longer the baseline for the jewellery industry. Insurers like Hiscox, Aviva, and AXA are looking for "Active Security" that closes the Response Time Gap. By installing a Density® fog system, you transition your premises from a target that can be recorded to a target that cannot be seen.
To ensure your premises meet the 2026 standards for Jewellers' Block insurance, use our PWA quote tool to assess your requirements.
Get a Technical Quote for Your Store
Technical Specifications Summary
| Feature | Density® UNIK | Density® 1500 Lite |
|---|---|---|
| Application | High-value cabinets / window displays | Showrooms / Shop floors |
| Coverage | Targeted (up to 100m³) | Up to 1500m³ |
| Power | Battery (6+ months) | Mains with Battery Backup |
| Certification | EN 50131-8 / CE | EN 50131-8 / CE |
| Fluid Type | Food-grade / No residue | Food-grade / No residue |
