
Private Investigator London | SPI
Covert Surveillance Services
TSCM Bug Sweeps
People Tracing
Background Checks
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GATHER EVIDENCE
REVEAL TRUTHS
TAKE CONTROL
Hiring a Private Investigator in London
If you are seeking discreet and confidential private investigators in London, SPI are your trusted partners. Offering a wide array of services including covert surveillance operations, people tracing, TSCM bug sweeping and other investigative services for private clients, corporate clients and law firms. Our private detective agency carefully tailors inquiries on a case by case basis to ensure provision of our cutting-edge-technology and the most appropriate methods of investigation. SPI is a leading private investigation agency with extensive military backgrounds and years of experience. Our experienced investigators have a positive reputation for building key evidence and revealing hidden truths. Our ultimate aim is to provide cost effective solutions in support of our private and corporate clients by seeking answers and taking back control of situations.
SPI's London Private Detective Agency - Industry Professional Associations
To ensure an exceptional service which is provided in a legal and ethical manner, it is strongly advised to only hire private investigators holding active memberships with the known professional associations in the UK. In the absence of UK government industry regulation, only the associations can hold investigators to account for their investigative actions. Without membership, investigators typically operate in a rogue and illegal fashion with no one to answer to.
London Private Investigation Agency Services

SPI provide a diverse range of discreet private detective services to assist individuals and law firms across London. From personal matters such as relationship investigations when cheating spouses are suspected, to child custody disputes. With access to a vast network of local private detectives in London, we are experts in our field. Our investigative services support private clients and legal professionals in many ways, but we are typically called upon for domestic investigations or an upcoming court case. This includes divorce proceedings, cohabitation concerns, thorough background checks and more. We understand domestic problems can be sensitive, stressful and emotional topics of discussion when hiring private investigation agencies. This is why our experienced investigators manage each case effectively by delivering professional services with the empathy our clients deserve.
Surveillance Services
Our private detective agency approaches many cases with advanced surveillance techniques due to their effectiveness of intelligence gathering and clear, irrefutable video evidence. Some may consider surveillance and GPS tracking services to be extreme measures, but in reality they are the only way of revealing hidden truths. Surveillance can be used for many reasons, but in a private sense it is often used when cheating spouses are suspected. Our investigation agency is equipped with the latest technology and skilled at uncovering the truth by providing clear video evidence. In such sensitive cases, SPI deliver results with focused attention to detail. Clients are ensured they have the information they need and pay for when hiring an expert London investigator.
Occupancy & Verification Services
Trying to locate a missing person or confirm someones current address and other contact details can be difficult. Sentry Private Investigators in London offer tracing agent services and thorough background checks to support individuals and professionals needing to locate someone. SPI’s tracing agents have access to live databases which the general public are typically not privy to. This allows our experienced investigators to quickly and accurately confirm key contact information and current address data. Whether trying to reconnect with long lost family members, debt absconders or ex-partners, we have the correct resources to obtain information and locate people at their current addresses whilst confirming their up-to-date contact details.
Covert Bugging Devices
With the rise of cheap and easily available bugging devices, the need for technical surveillance counter measure bug sweeps are becoming more common than ever. A typical situation we see is when a relationship breaks down and one side is forced to leave the family home. That person will plant some form of recording device in the property to eavesdrop on conversations or even watch whats going on inside. To suspect you are being monitored in your own home is not a nice feeling and it certainly breaks privacy laws. SPI counter these threats with trained technicians and cutting-edge-technology.
On completion of investigations, clients receive evidence and final reports consolidating all findings for personal use in a timely manner. Our reports and evidence are also suitable for court proceedings if legal action is being pursued. Please note, to ensure client expectations, report writing for surveillance services is charged additionally beyond our hourly rate, at our administrative work rate.
Corporate Investigation Services
Our London based private investigators offer investigative support to businesses entities of all sizes. Our highly skilled corporate investigation services are provided to gather accurate evidence, information and data. With our advanced surveillance techniques, wee build evidence to place business owners in empowered positions with an informed stance, which allows for the prospect of clear and effective decision making. With SPI’s tailored private detective support, business reputations and financial standings remain protected throughout the investigative process.

Corporate Surveillance Operations
Sentry Private Investigators in London are highly specialised in advanced surveillance techniques. This service alone proves effective to businesses when employees are suspected of taking suspicious periods of absence from work. When management or HR departments suspect an employees reasons for absence are fabricated or exaggerated, they are usually correct. Our surveillance agency pays meticulous attention to an employees daily activities. We discreetly gather video evidence and we work closely with clients to confirm the legitimacy of employee absences.
Tracing Agents UK
Sentry Private Investigators tracing agent services are key to investigations in London, especially when dealing with a missing persons case. Not only do they form the basis of covert surveillance operations, they also prove effective to businesses who need to locate someone. Whether it be for a debt absconder or to serve an injunction for a court case, tracing agent services prove invaluable for providing accurate information and SPI are proud to promote high success rates. With years of experience, we offer cost effective tracing agent services on a ‘no find, no fee’ basis. As standard, clients receive formal reports within 24 hours.
Commercial Office Debugging
Technical surveillance countermeasure bug sweeps are becoming a necessity for businesses across London. Confidentiality is paramount in most cases, but when a recording device is suspected to have been planted a sensitive area of an establishment, it can cause serious problems. Whether a device is actually planted or not, just the suspicion can negatively affect the way a business operates. For example, conversations and private meetings will need to be held elsewhere or even cancelled until the area has been cleared. Our experienced team at Sentry Private Investigators are known for delivering professional, rapid deployment commercial bug sweeping services operating with the latest technology in support of businesses across London.
Trusted Private Investigation Companies in London
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When choosing a professional detective agency in London, due diligence checks are essential. It’s important to ensure the agency is transparent, legitimate, operates within the law and has the clients best interests at heart. Researching an investigator for excellent service reviews is a good start. Hiring a private investigator in Greater London is perfectly legal. Licensed private investigators do not exist in the UK which is why you should approach only professionally associated agencies who understand the laws surrounding investigative services. Due diligence checks can be minimised for private individuals, businesses and law firms by simply sourcing investigators through the well known professional associations. SPI are leading team of private investigators with a proven track record of exceeding client expectations. Over the years we have supported many business clients with operational concerns, private clients with personal matters and legal professionals preparing for a court case. Trust between clients and private detectives in London is a pivotal factor in determining whether the investigators full range of proposed services will be utilised. The UK private investigations industry is currently without government regulation which creates necessary hurdles when building trust through the investigative process. Unfortunately, there are many individuals claiming to run legitimate private investigators in London, or promote that they are the best private investigators in town. When actually, they lack the knowledge and expertise to operative with professional standards. These individuals produce questionable investigation work by promising results, charging extortionate rates and simply failing to deliver. SPI are experienced private investigators in London who help clients pursue their objectives. We work closely with our clients and we provide realism when the truth is needed. SPI conduct thorough investigations and we are entirely transparent with pricing from the offset.
TSCM Bug Sweeping London
Sentry Private Investigators offer dedicated TSCM bug sweep services to businesses, individuals and law firms who are concerned with threats to their privacy and security. Our expert counter surveillance technicians are skilled and proficient with the most advanced bug detection equipment available today. Equipped with the latest technology and acute attention to detail, we detect and extract all hidden recording and tracking devices to maintain expected privacy levels and restore peace of mind. Our TSCM bug sweeps in London are conducted in a tactful and precise manner to ultimately pinpoint any malicious devices installed within residential, office and vehicle environments. SPI regularly monitor industry prices which allows us to offer our service at far more attractive rates than other TSCM bug sweep companies in London.
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Swift London
Deployment Service
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Latest Technology Bug Detection Equipment
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Office, Home and Vehicle TSCM Bug Sweeping London

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Expert TSCM Specialist Technicians
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Confidential TSCM Bug Sweep Services London
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Affordable TSCM Bug Sweep Price Tags

People Tracing Agents London
SPI's London based private investigators offer 'no find, no fee' people tracing services with a guaranteed 24 hour turnaround. With vetted access to live databases, our private detectives quickly pinpoint individuals to their current addresses with key contact information. Our tracing agent London services are used to reunite long lost friends and family, but also to form the basis of future investigative work such as surveillance operations and process serving. People tracing investigations can be completed with very little information.
No Find, No Fee
Based on the provision of accurate names and dates of birth, our investigation agency provide people tracing services to private individuals, businesses entities and law firms on a 'no find, no fee' basis. We offer this excellent service guarantee due to the confidence we have in our tracing capabilities, and to eliminate any financial risk to our clients.
24 Hour Turnaround
With access to multiple live data bases, our team of private investigators operate to the highest standards and work quickly to find the information clients are seeking. We analyse the data to ensure our findings are accurate before producing a detailed report prior to distribution. All done within 24 hours!
Detailed, Actionable Results
Our databases are renowned for providing accurate and reliable information relating to an individuals current and former address history. These databases deliver actionable results by also confirming third party occupants, former residents and other specific information. As part of our people tracing services, we also conduct sweeps for digitally recorded telephone numbers and Email addresses.
SPI's Approach to Private Investigations in London
Professional
Our dedicated team conduct discreet investigation services and deliver results with integrity and professionalism throughout the investigative process.
Ethical
With years of experience, our effective investigations are conducted with robust ethical standards and accountability and the utmost confidentiality to exceed client expectations.
Compliant
SPI's investigation agency operates in compliance with all UK privacy and data protections laws. This is to ensure an exceptional service within all legal frameworks.
Quality
Sentry Private Investigators work closely with clients by providing quality and efficient investigative services with both our private and corporate investigations.
Private Investigator Frequently Asked Questions
Do PI's investigate cheating spouses? How do you hire licensed private investigators? Can a private investigator help with my court case?Who are the best private investigators in the London? These are some of the questions private investigators receive on a daily basis. See our list of FAQ's to answer any burning questions.