Empowering Businesses and Individuals with Actionable Intelligence Worldwide

Since 2012







    What we do best


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    Insider risk consultants and protection should be fundamental elements of any organisation’s security strategy. Employees, contractors, suppliers, and business partners all have legitimate access to systems and assets within an organisation, which makes them a …

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    Copyright infringement is an increasingly prevalent issue in the UK, where creative and proprietary works are often illegally reproduced without the consent of the original owner. This type of infringement takes many forms, from online …

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    In the UK, personal injury insurance fraud poses a significant challenge resulting in substantial financial losses for both insurance companies and honest policyholders annually. This fraudulent activity involves individuals or groups providing misleading information to …

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    Those trained in covert operations are specially trained to blend in and cope with rural landscapes, so no matter what kind of crime is occurring in your area we can protect your land, livestock, machinery, …

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    Businesses operate successfully in a competitive market by having something unique. Whether it’s a product idea, process or market research data, the information you use to set your business above the rest is valuable to …

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    Covert surveillance is conducted by concealing it from the subject, or by ensuring they are unaware of its presence.  Directed surveillance operations involve the covert monitoring of targets’ movements, conversations and other activities.  Those who …

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    Matrimonial disputes, and big life decisions, are best made when they’re based on facts. Our team of private investigators in Scotland are discreet, efficient, and non-judgmental. We conduct matrimonial investigations professionally and within the law …

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    Fraud is any type of dishonest act intended to provide someone with an unfair advantage over another. The term corporate fraud investigation refers to cases in which a company or organisation is involved. As part …

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    A process server is used to give legal notice to a person of a court’s intention to make them a party to a claim so as to enable them to respond to the proceedings before …

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    At Dion International, we provide comprehensive investigations and due diligence services to corporate and commercial businesses and law firms. Our experienced team of investigators are experts in conducting discreet and effective investigations to uncover the …

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    Welcome to the Family


    Private Investigator London

    At Dion International, we provide discreet and professional private investigation services across the United Kingdom, including major cities like London and Manchester and the surrounding areas. Our highly experienced team, comprised of investigators with military and law enforcement backgrounds, is dedicated to delivering tailored solutions that meet your specific needs. Whether you’re dealing with personal issues or require business-related investigative services, our London-based team ensures a prompt and professional response.

    For private clients, we offer a range of services, including matrimonial and infidelity investigations, child custody disputes, and tracing missing persons. We understand how sensitive these matters can be, and our compassionate investigators work diligently to gather the necessary evidence. Using advanced surveillance, covert operations, and lifestyle checks, we help uncover the truth, providing you with the information you need to make informed decisions and move forward with confidence.

    Our corporate investigation services in London are designed to protect businesses from internal and external risks. We offer comprehensive solutions such as fraud investigations, due diligence, and insider risk management. Whether you’re dealing with workplace fraud, corporate espionage, or require thorough background checks, our investigators deliver reliable results. We also provide litigation support for businesses, equipping you with strong, court-admissible evidence for legal disputes and ensuring your company’s interests in London are protected.

    Who we serve


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    Executive Solutions All Under One Roof for Corporate Clients in the UK In today’s fast-paced and ever-evolving corporate environment, businesses are faced with a wide range of security challenges and legal issues that require specialised expertise. …

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    Executive Security Solutions All Under One Roof for Private Clients in the UK Dion International has established a formidable reputation as a dependable provider of top-notch personal security and private investigation services for private clients over the years. Our services …

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    Executive Solutions All Under One Roof for Legal Firms Across the UK International organisations across the UK and abroad consider Dion International as Scotland’s best detective agency, why? Because our experienced private investigators find effective solutions …

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    Executive Solutions All Under One Roof for Housing Associations in the UK International organisations across the UK and abroad consider Dion International as Scotland’s best executive security company, why? Because our experienced operatives find effective solutions …

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    Executive Security Solutions All Under One Roof for Local Authority in the UK Our officers will guide our clients to make informed decisions that safeguard their people, assets, and reputation. We have the knowledge, expertise, and …

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    Uncover the truth


    Discreet and Professional Private Investigation Services in London

    In addition to private and corporate investigations, Dion International offers a variety of specialist services for legal professionals and businesses throughout London. We work closely with law firms, providing litigation support, evidence gathering, and process serving. Our expert investigators produce court-admissible evidence through methods such as surveillance, witness statements, and document retrieval, ensuring your legal cases are built on solid, verifiable information.

    For businesses in London, we offer specialised services like copyright infringement investigations, insurance fraud investigations, and intelligence gathering. Our team employs cutting-edge technology to detect and document infringements, helping companies protect their intellectual property and address fraudulent claims. Additionally, we conduct thorough background checks and due diligence to help businesses mitigate risks in critical areas such as partnerships, investments, and employment.

    With a diverse range of services, including surveillance, asset tracking, and legal document serving, Dion International is committed to delivering discreet, effective solutions for clients across London. If you need a trusted private investigator in London who has extensive local knowledge of every, residential area, office block and industrial estate within the city centre then contact Dion International today for a free consultation.

    Technical Services


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    Computer forensics, also known as digital forensics, is a branch of forensic science that involves collecting, preserving, analysing, and presenting electronic data for use in legal proceedings. Computer forensics experts use various tools and techniques …

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    Protect your privacy with our expert Technical Surveillance Counter Measures (TSCM) services. Our TSCM team conducts a comprehensive threat assessment to determine the level of sophistication and access of potential hostile parties, providing a proactive …

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    At Dion International, our tracing agents in Scotland strive to maintain an extremely high success rate, working efficiently on your behalf with a team of professional private investigators. We specialise in locating missing persons, long …

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    Vehicle GPS real-time tracking services allows live tracking of a subject over a period of time without the expense of a full team of private investigators. In the UK, GPS trackers are commonly used as …

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    In a world driven by vast amounts of publicly available data, organisations and individuals need expert guidance to harness this information and turn it into actionable intelligence. Dion International Ltd provides comprehensive OSINT (Open Source …

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    Private Investigator in London Q&A


    How long does it take for an investigation to commence in London?

    The start time for an investigation varies depending on the complexity of the case, but our field agents in London can typically begin within a few hours. Whether it’s surveillance, people tracing, or gathering evidence, we mobilise quickly to ensure your investigation starts as soon as possible.

    How much does it cost to hire a private investigator in London?

    Costs vary depending on the case but typically range from £35.00 to £275.00 per hour. We offer clear pricing through our “Free Estimate” tool and provide daily rate packages for long-term investigations in London.

    What types of clients typically hire private investigators in London?

    Our private investigators in London serve a broad range of clients, including individuals, law firms, corporations, and insurance companies. Clients often seek assistance in cases involving employee misconduct, spousal infidelity, corporate fraud, and missing persons.​

    How to find a local private investigator near me in London UK

    Search for “private investigator near me,” verify reviews, location details, and schedule a meeting to ensure credibility. Dion International HQ is in Edinburgh, Scotland with investigators operating in London and meets clients in person.

    Why do I need more than one surveillance officer in London?

    While one officer may seem cheaper, the increased risk of detection can prolong the operation. A team approach ensures efficient results, saving you time and money in the long run.  Feel free to contact us to discuss how two or more surveillance officers in London is better than one.

    Why choose Dion International Ltd?

    Unlike other private investigation companies in London we begin each case with a thorough analysis to optimise deployment, minimising costs and ground time. Our highly trained investigators manage both sensitive personal cases and complex business disputes globally, always prioritising professionalism, discretion, and cost-effectiveness.

    Are your services discreet?

    Yes absolutely, all our services across London are conducted with the utmost discretion. We prioritise confidentiality while delivering reliable, cost-effective solutions. For more details on our discreet approach, feel free to contact us.

    Can private investigators in London provide evidence for court cases?

    Yes, our private investigators in London can gather court-admissible evidence, including surveillance footage, witness statements, and background checks. This evidence can be used in legal cases such as divorce, child custody, and fraud disputes, provided it is obtained through legal means​.

    Are private investigators legal in London?

    Yes, private investigators in London operate legally under GDPR and RIPA regulations. They must follow strict legal guidelines to ensure all actions are admissible in court.

    What private investigators in London can’t do?

    Private investigators in London cannot access devices without permission, obtain bank records without authorisation, access criminal histories unless publicly available, or remotely access local authority CCTV systems.  An experienced private investigator just knows where to look.

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