Technical Surveillance Countermeasures (TSCM)

Darlington, Stockton-on-Tees, Middlesbrough and surrounding areas

For those clients who suspect they may be at risk from electronic surveillance/espionage/interception, we are able to offer this highly specialised field of technical investigation.

TSCM (commonly referred to as 'bug' or 'electronic' sweeping) is a counter-intelligence activity and refers to the countermeasures that are employed to detect or defeat attempts to gain any information, whether privileged, classified, confidential or of a very personal nature, through the use of a variety of  eavesdropping and other covert listening and transmitting devices.

We are able to provide these very rare specialised skills to the Corporate, Sports, Commercial and Government sectors, utilising the very latest forensic and electronic technology operated by highly trained  professionals with extensive worldwide experience.

(Note: This confidential service is available to clients in the UK and overseas for
legitimate, legal and lawful purposes only.)

GST Investigations also offer a number of  highly professional  bespoke specialist investigative/security services which can be tailored to suit each company or each individuals exact requirements. Please contact us to discuss these services and other specialist requirements in detail.

Our specialist services  investigative and security  services include (but are not limited to):

Process Serving
Legal Documents served professionally at competitive rates.
UK and International
Covert/Overt CCTV
Camera Installation and Security Systems
GPS Vehicle covert tracking equipment
Supplied and installed lawfully and professionally.
Close Protection
Ex specialist police and military personnel with
extensive foreign language skills.


All enquiries and investigations are dealt with promptly, ethically and in the strictest confidence by an experienced private detective. All our investigators are CRB checked and have a wide range of specialist skills in covert intelligence and surveillance operations at national and international law enforcement level.


Whether you are a business or an individual, we promise to approach your case with an equal degree of professionalism and confidentiality and we will do our utmost to resolve matters to your complete satisfaction within the law.

For you free, no-obligation consultation, call now on 07538881582 or fill in the form on the right for a same day call-back.