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Professional Technical Surveillance & Security Services – UK Wide
Discreet, lawful, and expert surveillance operations, training and equipment — trusted by corporate, government and private clients.


Unlock Your Potential with SIASS and Verrimus TSCM Training for Professionals
In today’s world, security threats are more sophisticated and harder to detect than ever before. Whether you work in corporate security, government, or private investigation, understanding how to identify and counteract electronic surveillance is crucial. That’s why SIASS has partnered with Verrimus, specialists in Technical Surveillance Countermeasures (TSCM), to offer commercial TSCM training designed specifically for professionals like you. This collaboration brings togeth
2 days ago3 min read


Understanding Technical Surveillance
Understanding Technical Surveillance: Methods, Implications, and When It’s Appropriate In an era defined by rapid technological advances,...
Aug 29, 20253 min read


Modern Tools of Surveillance
Surveillance is no longer confined to shadowy figures watching from the corner of a street. Today, it’s powered by technology that is...
Aug 27, 20253 min read


Understanding the Rules: Covert Surveillance and Technical Investigations in the UK
When planning an investigation that may involve covert surveillance, it’s vital to understand the legal framework that governs how it can...
Aug 26, 20252 min read


When Private Investigators Need Technical Support: The Role of a Commercial TSU
Private investigators (PIs) are skilled professionals who excel at gathering evidence, conducting interviews, and managing complex cases....
Aug 26, 20253 min read


Is It Legal to Conduct Surveillance Privately in the UK?
Surveillance can be a powerful tool in both private and civil investigations – but it also raises important legal and ethical questions. At SIASS , we are often asked: “Is it legal to conduct surveillance privately in the UK?” The answer depends on how surveillance is carried out , who is being observed, and whether the activity complies with UK law. In this article, we’ll outline the legal position, explain the risks of carrying out surveillance without professional guidanc
Aug 26, 20252 min read


Understanding the Importance of Surveillance Services in Investigations
In today’s fast-paced world, the need for effective surveillance services has become more critical than ever. Surveillance plays a vital...
Aug 26, 20254 min read


Domestic Abuse Investigations: How a Private Investigator Can Assist
Domestic abuse is a deeply personal and traumatic experience that affects countless individuals across the UK every year. Domestic abuse...
May 19, 20253 min read


What is a Commercial Technical Surveillance Unit (TSU)?
What is a TSU in UK policing? What does SIASS offer the commercial and private sector?
Jul 12, 20243 min read


What is Technical Surveillance?
Technical surveillance is an essential aspect of modern investigative and security operations. SIASS supports clients acting as their TSU.
Jul 11, 20243 min read


Using Covert Cameras to Capture Instances of Abuse: A Growing Necessity for Families
In a world where vulnerable individuals are sometimes subjected to mistreatment, families often find themselves in a distressing dilemma....
Jul 10, 20243 min read
Take a look at our SIASS blog posts below. From information about operations we undertake, to articles about technical surveillance issues, to details about who we are and our approach to private investigations. You will find plenty to interest you.
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