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Private Investigator Essex & All UK – Global All Services Agency

Since 1994 – Competitive and Realistic rates. PEACE OF MIND-CERTAINTY

Audited 98.9% Success rate March 2024 Affordable confidential Experienced professional Male &Female Investigators based locally   & throughout all of the UK-Global reach



Full services Agency for private clients, business, lawyers, families and VIPs.

Independently audited 98.9% success rate (March 2024)

LOI Investigations specialize in the most complex cases in Essex & all of UK. Male and Female Investigators who live in & cover all UK Counties. Also multi jurisdiction matters see Global offices this means LOI can keep clients costs affordable and provide a very high success rate to private individuals business, corporates, VIPs and celebrities from tracing missing persons UK & Worldwide & or their assets, Fraud, divorce, separation and family issues. Covert Surveillance, Problem Solving and Cyber Solutions, Difficult and Unusual Cases.

Offices locally staffed in 44 countries, local, Bilingual, Private Investigators, professional, qualified and fully insured. All Hold local licenses where applicable – Total global reach

Competitive & Realistic Rates

No Hidden or Extra Costs


All types of investigations undertaken Worldwide

LOI guarantees absolute discretion and client confidentiality.

LOI Investigations, leaders in complex and major investigations. We are experts in obtaining accurate hard to obtain hidden information legally and globally in total confidence.

UK : 0800 1 939 333
Worldwide : +44 800 1 935 777



Qualified Professional Bilingual.

Private investigators available

24 hours per day, 7 days a week.



    Unfaithful Partner Investigations

    LOI Investigations offers specialised Infidelity Investigations Services, designed to provide you with concrete evidence and peace of mind. Our highly trained private investigator UK employ discreet surveillance techniques. Reach out to us for a confidential and comprehensive consultation.
    missing persons investigation

    Missing Persons Tracing

    Searching for a missing person in the UK or worldwide? LOI Investigations offers private investigator services & private investigator in Essex to locate lost friends, family members, or debtors. Utilizing the latest investigative techniques, our experienced team provides effective and discreet missing persons investigations.


    At Line of Inquiry, we offer in-house surveillance private investigators led by experienced professionals, including a former military intelligence officer and a Senior Surveillance officer with 23 years’ experience. Our surveillance services, available across the UK and worldwide, include mobile and static solutions, under-cover work, and the use of advanced technology. Whether discreet or covert, our fool-proof method ensures professional evidence gathering to meet your needs.

    Cyber Security Investigations

    Line of Inquiry offers Cyber Security Investigation services to thwart planned cyberattacks and minimize damage. Utilizing advanced monitoring, intelligence procedures, and in-depth data analysis, we stay ahead of potential cyber threats. Our capabilities extend to accessing information from the dark web, aiding in criminal investigations, fraud, and identity theft cases. Our innovative tools and methods, combined with AI-backed automation and expert human expertise, enable us to identify different types of threats and build defense systems tailored to individual business needs.

    Worldwide Phone Tracing Services

    LOI Investigations offers a GDPR-compliant UK & Worldwide Mobile Phone (Registered, Pay-as-you-go (burner phones), VOIP(Voice Over Internet Providers)) and Landline Tracing service. Obtain the full name, registered address, duration at the address, and additional connected information with utmost confidentiality.

    Social Media and online harassment

    Line of Inquiry provides specialized services to combat Social Media & Online Harassment in the U.K., including racial abuse, threats, and cyberbullying. Working with legal experts & private detectives UK, they use advanced technology to trace online interactions and prosecute harassers.
    Stolen Jewellery, Art, and High-Value Items Investigation Room

    Asset tracing and recovery

    Our asset tracing services are designed to help our clients identify hidden assets, such as bank accounts, real estate and other investments, that have been intentionally hidden to avoid detection. We use a variety of tools and technologies, including open source intelligence (OSINT), public records searches, and deep web analysis to trace and identify hidden assets. Our team of experienced private investigator Essex works closely with our clients to understand their unique needs and develop a customized asset tracing strategy that meets their specific requirements.

    Background Checks

    LOI Investigations specializes in accurate and thorough background checks for individuals and companies. Offering pre-employment background checks, including verification of education, employment history, and criminal record checks, our experienced Essex private investigator ensure the safety and security of your business and personal life. Trust LOI Investigations for reliable background checks with confidentiality and fast turnaround times.
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    Relationship Matters, Family Issues and Divorce

    Dealing with family issues and divorce? Line of Inquiry offers specialized private investigator UK services to assist in personal and financial matters, including hidden assets, pre-divorce background checks, and post-separation surveillance. Whether you suspect infidelity, need to assess financial status, or are concerned about child well-being, our experienced UK Private investigators handle these delicate situations with discretion and sensitivity. Contact Line of Inquiry to navigate family disputes and divorce with confidence and peace of mind.
    Stolen Jewellery, Art, and High-Value Items Investigation Room

    Jewellery Theft

    At LOI Research, we specialize in the recovery of stolen jewellery, art, and high-value items. Our dedicated team of private investigator UK is renowned for their expertise in tracking and recovering valuable items that have been lost or stolen. Our services are not just limited to the UK; we operate globally, providing our clients with the best chance of recovering their valuables.

    Relationship Matters & Family Issues

    Comprehensive support in family law matters, including relationship disputes and divorce cases. Our services extend to missing persons tracing, surveillance, and personal protection against blackmail. Utilizing advanced technology and an experienced team, we offer discreet and effective solutions tailored to the unique challenges faced by families.
    missing persons investigation

    Private Clients

    We at Line of Inquiry offer a range of services for private clients, including missing persons tracing, background checks, surveillance, and asset tracing. Specialized services are also available for relationship matters, identity theft, and blackmail. Our experienced team utilizes advanced investigative techniques to provide effective and discreet solutions tailored to individual needs.
    Family Disputes, Relationship & Divorce Financial Investigations

    Criminal Defence

    Line of Inquiry has a proven record of success providing legal support for extremely high-profile defendants as well as members of the general public. At LOI we scrutinise all police evidence, reconstruct crime scenes and re-analyse the line of questioning our clients may have been subjected to at the police station and/or by the Prosecution in court.

    We work with highly experienced former Police Detectives, independent forensic laboratories and crime scene experts.

    Private Prosecutions

    For Private Prosecutions, we have an in-house solicitor at your disposal as well as certified court enforcement officers. Our Private Prosecution service can offer the legal knowledge and litigation support you need. If you have exhausted all of your resources, don’t despair, because our team of investigative professionals has the expertise you need to bring your case to court.
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    Sexing and Catfishing

    Considering a Sexing & Catfish Investigation? Line of Inquiry provides in-depth, comprehensive reports to help you in your Catfish Investigation. Catfishing consists of taking a false identity online to win somebody’s affection. They hide behind a fake profile picture and create a backstory to their lives to trick the victim into trusting them. Contact LOI for expert private investigator for Catfish Investigations.
    Blackmail Investigation


    Line of Inquiry understand that each blackmail case is unique. Our approach is highly customized, taking into account the individual circumstances and specific demands of each situation. Whether it’s a case of corporate espionage, personal vendetta, or cyber harassment, our Private investigators for Blackmail investigations are equipped with the skills and tools necessary to address the challenge effectively. Leveraging Technology in Blackmail Investigations

    Suspicious Death

    At Line of Inquiry, we have the necessary experience to investigate unsolved murders, suspicious death and questionable suicide. There are also a worrying number of innocent men and women serving life or lengthy prison sentences for crimes that they did not commit. We have access to many sources who can help us to obtain court papers for re-examination and we have access to independent forensic laboratories, forensic experts, private investigators and retired police detectives.
    missing persons investigation

    Acquisition and Mergers

    Considering an acquisition or merger? Line of Inquiry provides in-depth, comprehensive reports to answer key questions before you commit to a transaction. Our experienced team goes beyond paper, assessing potential risks, financials, cybersecurity, and IP issues, ensuring you know exactly what you’re entering into. Contact LOI for expert support in the acquisition and merger arena, backed by case studies and testimonials.


    Construction Fraud

    Construction industry fraud is increasing at an alarming pace. LOI Investigations in the last 9 years, have been involved in the private investigation of construction frauds, in excess of 190 million USD to as small as five million GBP. To date, in total we have worked on over 20 projects. At LOI Investigations, we can and will reduce clients exposure to these risks.


    Line of Inquiry offers a comprehensive suite of services tailored for businesses. These include business intelligence, asset tracing, debtor tracing, and competitive intelligence. Specialized services extend to acquisition and mergers, investment intelligence, and supply chain risk mitigation. Our experienced team employs advanced technological tools and investigative techniques to ensure your business stays ahead in a competitive market.

    Intellectual Property

    LOI Investigations conduct IP Property Investigations always underneath the direction of Legal Counsel. LOI is an established, recognised, intellectual Property Investigation Consultancy. Since 1996, we have provided valuable insights, with completely reliable and actionable resources which support intellectual Property Investigations

    Cyber Investigations

    We offer a comprehensive range of Cyber Investigation services, including tackling catfishing, social media harassment, and cyber threats. Our expertise extends to cryptocurrency investigations and technical counter-surveillance. Utilizing a team of former FBI agents, we provide robust solutions to protect both individuals and businesses from various cyber risks.


    We at Line of Inquiry specialize in litigation investigation and support services, offering worldwide assistance for both civil and criminal cases. Our services include fraud investigations, asset tracing, and family law support. Utilizing advanced technology and techniques, we work closely with legal teams to provide expert analysis and testimony, adhering to the highest ethical standards.

    Offices In London and Globally

    24/7 availability, in office, over the phone as well as online.

    We can visit clients or if preferred schedule Zoom/Google Teams meetings.
    Meetings in office by prior appointment.


    Featured in Media

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    Navigating Child Custody Disputes with Expert Private Investigators

    Gain insights into how professional investigators play a pivotal role in child custody cases, offering discreet and expert services to navigate the complex terrain of family law. Discover how their investigative expertise can be a decisive factor in safeguarding children’s best interests.

    Safeguarding Your Heart and Wallet: How Private Detectives Can Help in Cases of Romance Fraud

    Discover the vital role of private detectives in combating romance fraud. This post delves into how expert investigators at LOI Research help uncover deceit and safeguard individuals from emotional and financial exploitation in romantic relationships.

    Enhancing Corporate Security: The Vital Role of Background Checks in Hiring

    Discover how comprehensive background checks are essential in the corporate hiring process, serving as a critical tool in risk mitigation and ensuring the integrity and safety of the workplace.

    When to Seek Professional Help: Infidelity Investigations

    LOI Investigations offers professional and discreet private investigation services for those suspecting infidelity. Learn when to seek help and what signs to look out for.

    How a Private Investigator Agency Can Help Recover Scammed Bitcoin and Cryptocurrency Assets: A Quick Guide

    Learn how a private investigator agency like LOI Investigations can assist you in recovering stolen Bitcoin and other cryptocurrencies. Expertise in digital forensics, global networks, and legal assistance.

    The Importance of Due Diligence in Asset Tracing: A Comprehensive Guide

    Discover the indispensable role of due diligence in asset tracing. This comprehensive guide delves into how due diligence complements advanced investigative techniques, offering a holistic approach to uncovering hidden assets.

    Newsweek consults LOI about the disappearance and release of Monica De Leon Barba

    Californian Monica De Leon Barba was kidnapped in Mexico and later freed. Expert insights from LOI Investigations were featured in Newsweek. The case delves into the psychological toll of long-term kidnappings, challenges in foreign victim retrieval, and motives. Gavin Burrows adds personal experience.

    The Mysterious Disappearance of Levi Davis: Unveiling the Investigation

    In the perplexing case of Levi Davis, a talented musician who mysteriously disappeared, questions linger about his sudden absence and the enigmatic events surrounding it. Despite months passing since his disappearance, unexpected Instagram activity and puzzling sightings have added intrigue to the investigation. As private investigators, we delved into the shadows, uncovering perplexing details that defy explanation.

    Newsweek Consults Gavin Burrows about the Mysterious Disappearance of Julian Sands

    Explore the case of Julian Sands’ mysterious disappearance. LOI Investigations offers expert insights into theories, search challenges, and body recovery complexities. Consulted by Newsweek’s Gerrard Kaonga, we unravel this enigma.

    Building the Future

    Have Achieved :

    • Home office full criminal record cleared all employees
    • Full Members of the Institute of Professional Investigators
    • Fully Insured and Certified.
    • Information Commissioner’s office (ICO)

    Who We Are :

    Line of Inquiry (LOI) has an impressive network of Cyber Investigators (Government Level trained),  specialist unit surveillance experts and many other skilled experts. We have excellent, well-placed contacts throughout the world.
    Line of Inquiry Head Office is 5 Chancery Lane, London WC2A 1LG, conveniently located in the heart of the Legal District and has further offices in London UK, Ireland, Monaco, Luxembourg, Switzerland, Norway, Sweden, Denmark, Finland, Cyprus-north & south, Malta, Germany, Netherlands, Washington, New York, The Hamptons, San Francisco, Los Angeles, Houston, Dallas, Denver, Florida, Toronto, Singapore, Hong kong, Macau, Malaysia-Kuala lumpur, Thailand, Cambodia, Vietnam, Taiwan, Japan, Indonesia, Bali, Qatar, Kuwait, Dubai, Saudi Arabia, South Korea, Kazakhstan, Uzbekistan, Kyrgyzstan, Sydney, Melbourne, Brisbane & Gold coast, Canberra.

    Our business is to get you the information you require discreetly undetectably and in strict confidentiality.

    More About Us

    We are a group of highly experienced private investigators blending traditional trade-craft with modern investigation techniques. LOI is firmly established as one of the world’s leading Private Investigation consultancies, and all-round problem fixers.

    The founder of our company, was also commissioned to write a report, translated into every FIFA (Fédération Internationale de Football Association) member’s language on Press Intrusion, privacy and protection.
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    Achieved Credentials

    Line of Inquiry has contracted representatives who are licenced, if required in country whom are experienced, qualified, male and female private investigators with the exception of Russia. We do operate and have contacts in these regions but do not have a Line of Inquiry contracted representative permanently in the country. A Line of Inquiry contracted representative can visit you at any meeting place of your choice to discuss your case in total confidence.

    We Prosecute Fake Reviews & Any Third Parties Who Copy Clone Or In Anyway Copy (Any Content On This Website Or Act In Bogus Websites And Or Any Other Type Of Outlet As Gavin Burrows. Line Of Inquiry LOI)
    We know how to legally trace emails, YouTube, Facebook, LinkedIn, and Instagram posts & comments, trace email and chat box enquiries.
    Even if the spurious individuals are using VPNs. We can & we will assist in the prosecution of any fake reviews and we can assist you in doing the same whether you are a private individual, sole trader, SME or Corporate. We work closely with a leading London Lawyer and KC who specialise in this area and of course our own in-house Line of Inquiry Cyber Team.

    Please call :
    UK : 0800 1 939 333
    Outside UK : +44 800 1 935 777

    Chancery Lane In London
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