Professional Technical Surveillance Services – UK Wide
Discreet, lawful, and expert covert surveillance operations, training and equipment — trusted by corporate, government and private clients.
Technical Surveillance, TSCM & Covert Investigation Support
SIASS (Specialist Intelligence & Surveillance Services) is a UK-based provider of technical surveillance, covert investigation support, and Technical Surveillance Counter Measures (TSCM).
We support local authorities, housing associations, government departments, and commercial organisations in identifying, managing, and mitigating surveillance-related risks.
What We Do
We deliver practical, operationally focused services in the following areas:
Technical Surveillance (Covert Operations)
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Lawful covert surveillance support for investigations
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Evidence gathering in line with UK legislation
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Support for regulatory and enforcement teams
TSCM (Bug Sweeping & Counter Surveillance)
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Detection of hidden cameras and listening devices
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Workplace and residential sweeps
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Risk assessments for privacy-compromised environments
Surveillance Equipment & Advice
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Guidance on appropriate and lawful use of equipment
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Honest, vendor-neutral advice (including when NOT to buy equipment)
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Support in procurement decisions
Training & Awareness
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Training for investigators and enforcement teams
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Awareness sessions on hidden cameras, tracking devices, and technical threats
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Practical, real-world guidance based on operational experience
Who We Work With
We support organisations across the UK, including:
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Local authorities
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Housing associations
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Government departments
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Corporate security teams
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Legal and investigative professionals
Our work often involves sensitive environments where privacy, compliance, and evidential integrity are critical.
Hidden Cameras & Covert Surveillance: A Growing Risk
The availability of low-cost surveillance technology has made it easier than ever to deploy:
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Hidden cameras disguised as everyday objects
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Bluetooth tracking devices
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Covert audio recording devices
Many individuals and organisations are unaware of how easily these threats can be deployed.
We provide both operational support and education to help mitigate these risks.
Our ApWe challenge misleading claims and promote informed, responsible procurement.
Insights & Guidance
We regularly publish insights on:
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Hidden cameras and voyeurism
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Technical surveillance risks
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Procurement considerations
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Emerging threats (e.g. Bluetooth tracking)
👉 Visit our blog to learn more.
If you need support, advice, or simply want to understand more about how our services could be useful for you:
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Request a consultation
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Ask a technical question
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Discuss a potential requirement
We provide clear, practical guidance without unnecessary complexity or cost.
Important Note
SIASS refers to Specialist Intelligence & Surveillance Services (UK) and is not affiliated with SEND Information, Advice and Support Services.
Protecting privacy. Supporting investigations. Delivering clarity.
What is technical surveillance?
Technical surveillance involves the lawful use of equipment and techniques to observe, record, and gather evidence during investigations.
What is a hidden camera sweep?
A hidden camera sweep (TSCM survey) is a structured inspection designed to detect covert surveillance devices in a location.
Are Bluetooth trackers a risk?
Yes. Bluetooth trackers can be misused to monitor individuals without their knowledge. However, in many cases, detection can be achieved using standard mobile devices and appropriate apps.
Do I need expensive detection equipment?
Not always. Some commercially available equipment duplicates functionality already available via smartphones. We provide honest advice to prevent unnecessary expenditure.
Is covert surveillance legal in the UK?
Yes, but it must be conducted in accordance with legislation such as RIPA and IPA, and appropriate authorisation is required.
Why Choose SIASS?
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UK-based operational experience in surveillance and counter-surveillance
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Trusted by public sector organisations
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Practical, honest advice (not sales-driven)
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Focus on legal compliance and evidential integrity
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Clear distinction between equipment reselling and genuine capability
VETERAN OPERATED
The unit was formed by ex-British army personnel in 2000 to provide professional services to clients world-wide.
SIASS continues to be Veteran operated, so you can be assured of the highest service level available.
For further information about what we do and how we do it take a look at our blog pages.