Technical surveillance countermeasures (TSCM)
Bug sweeps and technical examination of environments where concealed listening devices are a concern. Combine physical inspection with relevant technical methods and report findings and limitations.
CATO & VEILINTELLIGENCE & INVESTIGATIONSDiscuss your matterSURVEILLANCE / TSCM / FIELD ENQUIRIES
Surveillance is a core part of our investigative practice. Experienced field teams work alongside analysts to examine specific questions, document relevant observations and test information gathered through other sources.

Bug sweeps and technical examination of environments where concealed listening devices are a concern. Combine physical inspection with relevant technical methods and report findings and limitations.
Define the investigative question and scope before deploying a team. Record observations accurately, including limitations and gaps.
Develop relevant local context, verify information and follow agreed lines of enquiry in support of a wider investigation.
Compare observations with records, timelines and source accounts. Keep what was observed separate from what may be inferred.
A structured observation record with relevant supporting imagery, timing, context and a clear explanation of the limits of the material.
We agree the scope, lead contact, reporting and fees before starting. The enquiries compare records, witness accounts and relevant relationships, testing alternative explanations and identifying gaps.
The reporting should distinguish what the evidence supports from what remains unresolved. Discuss how the work will fit your legal team’s brief where a matter involves proceedings.
TSCM / BUG SWEEPS & COUNTER-SURVEILLANCE
Physical inspection and technical examination of rooms where confidential information is discussed.
Discuss a technical sweep ↗A confidential meeting deserves a considered assessment of the environment around it.
Surveillance & TSCM ↗Common questions
Warning signs include confidential information leaking, unusual device behaviour and unexplained knowledge of your movements. A professional bug sweep (TSCM) checks rooms, vehicles and devices for listening devices, trackers and compromised equipment.
Offices, meeting rooms, homes, vehicles and phones. We check for audio and video devices, GPS trackers and signs of device compromise, and advise on reducing future exposure.
Yes, when it is proportionate, for a legitimate purpose and conducted within the law, including data protection and harassment law. We agree the purpose and limits before any surveillance begins.
A confidential first conversation
Discuss the concern, relevant locations and the question the field team must answer. Scope and reporting are agreed before deployment.
Discuss field enquiries ↗Explore the subject