London’s No.1 Private Investigations Agency with a 98.8% success rate.
Call our detectives on 0800 002 9153 to being your investigation. We start immediately.
Hire our investigators Surveillance, People Tracing, Corporate Investigations, Background Checks, Bug Sweeps & more.
I-Spy Detectives are the most trusted Private Investigators in London, with a 98.8% case success rate. Our private detectives are highly experienced, and provide a professional, discreet and affordable investigations service.
Our highly-skilled London Private Investigators work with private customers, high-net-worth individuals, and corporate investigation clients to help them resolve personal issues and threats to their businesses. We regularly undertake undercover surveillance, bug sweeps of properties & vehicles, tracing of people & assets, background checks, fraud investigations, and process serving of legal documents.
Our investigative services are based around:
- 100% Discretion – Sensitive situations require a delicate approach. Our team of detectives is well-versed in delivering results in even the most challenging of circumstances.
- Speed – We start your investigation immediately. A fast response increases success.
- Results – We have many repeat clients due to our ability to achieve the desired result.
- Our Global Network – We’ve built our reputation around a strong global network with an unrivalled depth of skills.
Our Investigators operate 24/7 across Greater London
Our London-based team is made up of investigations experts from all around the world and from many skilled disciplines, including the police force, the military, investigative journalists, cyber security and counter terrorism. They are a network of professional who can operate anywhere in the world 24/7 365 days per year.
Call our London team to arrange your investigation on 0800 002 9153 or email us here: office.ispydetectives@gmail.com
Recent London investigations include:
- Private surveillance on a cheating partner in Westminster.
- Process serving of divorce papers in Camden.
- Bug sweeps in Islington and Tower Hamlets offices.
- Legal evidence and witness statement gathering in Hackney
- Corporate surveillance of an ex-employee of a finance house regarding a potential breach of restrictive covenant in Hounslow
- Due Diligence Investigation in Croydon
- Internal Fraud Investigation in Hampstead
- Intellectual Property Theft Investigation in Greenwich
- Employee Misconduct Investigation in Mayfair
- Asset Tracing and Recovery Investigation in Finsbury Park
- Corporate Information Leak Investigation in Blackfriars
- Background Pre-Employment Screening in North Acton
- Litigation Support Investigation in Pimlico
- Cybercrime and Digital Forensics Investigation in Chelsea
Award-winning Private Investigator Services
Whatever your issue, i-Spy Detectives can provide you with the clarity and evidence to make fully informed decisions and robustly challenge and resolve difficulties affecting your life or business in the most cost-effective manner. Our private investigators in London have an enviable skillset that enables them to provide a diverse range of detective services. Our services include:
People Tracing & Background Checking in London
- Missing Persons Location
- Relative & Family Reconnection
- Beneficiary Tracing for Wills & Probate
- Debtor Tracing
- International People Tracing
- Birth Parent & Biological Family Finding
- Background Checking
- Address Tracking
- Telephone Number Tracing
- Land Owner Identification
Surveillance Services in London
- Covert & Undercover Surveillance
- GPS Vehicle Tracking
- Infidelity & Affair Investigations
- Mystery Shopper Investigations
- Evidence Gathering for Legal Proceedings
- Vehicle Recovery & Stolen Property Location
Corporate & Business Investigations London
- Corporate Due Diligence
- Breach of Non-Compete & Restrictive Covenant Investigations
- Employee Misconduct & Theft Investigations
- Business Partner Investigations
- Financial Investigations
- Brand Protection Investigation
- Corporate Espionage Detection
Fraud & Cybercrime Investigations London
- Fraud Investigation (Benefits, Insurance, Pension Scams)
- Identity Theft Investigations
- Cybercrime Detection & Prevention
- Computer Forensics & Security Testing
- Cryptocurrency Theft Investigation
- Phone & Computer Hacking Investigations
Technical Investigation Services London
- Bug Sweeping (Homes, Offices, Vehicles)
- Covert CCTV Installation
- Lie Detector Testing (Polygraph Examination)
- Security Penetration Testing
Legal Support Services
- Process Serving (Divorce Papers, Writs, Notices)
- Court Order Service
- Court Hearing Documentation
- Witness Interviews & Statements
- Evidence Gathering for Litigation
Personal & Family Matters
- Child Custody Investigations
- Child Support Enforcement
- Family Law Investigations
- Dating Profile & Catfishing Investigations
- Stalking & Harassment Investigations
- False Allegations Investigation
- Neighbour Dispute Investigations
Specialised Investigations
- Coercive Behaviour & Psychological Abuse Documentation
- Cult Infiltration & Investigations
- Caregiver & Domestic Staff Investigations
- Grooming Investigations
- Fly-Tipping Investigation
- Close Protection Services
Contact i-Spy Detectives
Contact i-Spy Detectives to hire a private detective in the London area today! We can speak to you on email or on your communications channel of choice, including Whatsapp, Zoom, Microsoft Teams, Skype or Google Meet.
London Private Investigator Costs
You may be asking if it is worth the cost to hire a private investigator in London? Private investigation work is not an unskilled or unqualified task; we use professional, highly experienced and trained operatives to ensure a discreet service and the most robust of evidence gathering and report writing for our clients.
Many private investigations go wrong when clients try to undertake these on an independent basis or pay cheap and less experienced or less ethical agencies to carry out this work; surveillance or a vehicle tracking device being facilitated by an untrained person and exposed or uncovered by the subject will completely invalidate any evidence achieved or any future opportunity to gather more, meaning any issue or challenge will be unresolvable.
The full cost of the work i-Spy Detectives undertake for you will depend on the details of your situation and services required, but a rough guide to our costs is provided below to aid in your decision.
People tracing services from £99 to £489. Surveillance ranging from £389 to £780. GPS Tracking Devices from £99 to £988. Lie Detector Testing from £450 per test. Corporate Investigations in London starting from £740. Bug Sweeping Services starting from £998.
Why Hire iSpy Private Detective Services?
As the UK’s foremost private investigations agency, i-Spy Detective offers expertise you can trust when facing sensitive or complex situations. We recognise that engaging a private investigator is often an unfamiliar and potentially intimidating process. That’s why our seasoned team of professionals provides comprehensive guidance throughout your entire journey with us. With our extensive knowledge and proven track record, you can feel confident that your case is in capable hands. Our London detectives have been asked to contributes their advice and expertise in some of the world’s leading publications, including The Sun, The Mirror, The Express, MSN News, Metro, The Daily Record, Unilad, Bristol Post and Wales Online.
About I-SPY Private Detective Agency
The investigative organisation I-SPY Private Detective Agency serves London as a reliable provider of private investigative services. Our company established years ago specifically provides discreet professional and reliable private investigator services within London.
Our position as London’s leading private detective agency motivates us to combine conclusive services with complete security measures since we value absolute confidentiality. For anyone who needs private investigation services in and around London the trusted choice should be I-SPY.
Why choose i-Spy Detectives Private Investigators London?
When you contact our London private investigators you can be assured of a non-judgemental and respectful response, and that we absolutely guarantee full confidentiality and discretion. We will listen to you to fully understand your difficulty or dilemma and then talk you through the solutions we can provide, so that you know exactly what work we can undertake, what you will receive and how much it will cost you to best and most effectively achieve your aim.
Throughout any investigation undertaken for you, you will receive regular updates so that you know what is happening and have the reassurance that the work we are doing for you is being carried out in a thorough, pro-active and competent manner. At the end of any investigation we undertake for you, we will provide a full professional report including photographic evidence so that you have all the documentation and concrete proof you need.
The key reasons to choose I-SPY Private Detective Agency for your investigative demands are:
Expertise and Experience: With numerous years of expertise our London private investigator agency brings seasoned professionals who specialise in various investigative matters.
Comprehensive Investigation Services in London: Our London facility runs a comprehensive list of investigation services that extend from surveillance and background checks to fraud investigations and asset tracing operations.
Discreet and Confidential: Detective services provided by I-SPY in London maintain absolute confidentiality which allows for both precise investigative work and operational secrecy and privacy protection.
Use I-SPY services for London-based investigations to receive professional and reliable answers for your needs.
Strong Professional Networks
The strong professional network of our services stands out as a critical success factor for every investigation we conduct because it supports complete investigation success. London-based private investigators at our organisation combine their expertise with membership in an expansive network extending to many industrial sectors.
Our network contains superior-level London-based private detectives who excel in different areas of investigation such as tracing digital trails through cyber expertise and conducting criminal investigations with former law enforcement experience. The detective services in London offered by our company deliver access to a vast network that unites seasoned professionals with state-of-the-art tools and complete proficiency in local legislation.
Final Summary Report with State-of-the-Art Technology
Our London-based private detectives deliver a complete final summary report which contains clear and precise and actionable findings after your investigation has finished. London-based surveillance experts utilise state-of-the-art technology to obtain accurate data through advanced tracking tools and digital forensics for support of their findings.
Our advanced technologies allow both clients who seek London-based private investigative services and those handling extended London cases to receive precise data-based choices.
No Hidden Charges
Transparency is so essential to our way of working at our agency. Our London private investigator services come at zero hidden charges.
All aspects of the case are taken care of professionally by our London private detectives, with no hidden fees. We will deliver outstanding service and complete transparency.
Locations we cover across London
i-Spy Detectives offer a full range of private investigation services from our offices based within the city. We have an unrivalled network of over 50 UK-based Private Detectives who we can call upon, for even the most challenging investigations. Our team of investigators are regularly helping law firms, companies, and private individuals in Soho, Covent Garden, Mayfair, Marylebone, Fitzrovia, Bloomsbury, Holborn, City of London, Clerkenwell, Shoreditch, Westminster, St. James’s, Piccadilly, Leicester Square, Chinatown, Southbank, Lambeth, Waterloo, Bankside, Borough, Greenwich, Croydon, Bromley, Harrow, Sutton, Kingston Upon Thames, Richmond upon Thames, Hounslow, Ealing, Hillingdon, Brent, Barnet, Enfield, Haringey, Waltham Forest, Redbridge, Havering, Barking and Dagenham, Newham, and Lewisham.
Our London Office is situated at 19 Palmer Street, London, SW1H 0AD. At our London Head Office location in Westminster, we are easily accessible to private and corporate clients based in the central and greater London area. We are located just a short walk from the Broadway London Underground Station.
To find us if you are travelling by London Underground, turn left when you exit the Broadway London Underground Station and cross Palmer Street. We are located next to the Starbucks coffee shop. We are also within walking distance from the St James Park London Underground Station or a short taxi ride from Westminster Cathedral or Buckingham Palace.
Our Central London office enables our prime location to for our local private detectives and private investigator services across the capital and into the surrounding areas.
From our office in the capital, we are able to cover the central London locations as well as the greater London area reaching from Harrow to Greenwich, from Islington to Chelsea, and from Wembley to Brixton, and all areas contained within this radius on an immediate and on a 24/7 basis.
We also agency offices located across the UK that enable us to provide investigation expertise in any area. Locations include Manchester, Liverpool, Birmingham, Glasgow, Edinburgh, Southampton, Bournemouth, Brighton, Tunbridge Wells, Leeds, Leicester and Newcastle-Upon-Tyne.
If you required investigations on an international scale, then we also have teams of detectives in the USA, Canada, India, Spain, Germany, Thailand, UAE, and Hong Kong.
Contact iSpy Detectives
Looking for a trusted investigator? Contact I-SPY detectives, your reliable London private investigator, for discreet and effective solutions.
Our Commitment to Excellence
We have the capacity, knowledge and resources to ensure that all of our private investigation work is fully compliant and undertaken in a lawful and ethical manner. Most importantly, we achieve the results you need.
At our London PI agency, we employ a large and dedicated team and background check all agents; all of our private detectives, both male and female, are fully trained and sourced from government, military or police backgrounds and have the expertise to guarantee that you receive competent and effective service. They are tenacious, creative and highly-skilled.
We work with both private and commercial clients to provide the highest quality private investigator services, ensuring the most robust and irrefutable evidence for you.
At i-Spy Detectives, we recognise the significance of our outcomes and you can have complete confidence that we will always go the extra mile to provide a bespoke and individualised service and obtain everything you need.
If you require a private investigator in London, contact us now to find out how we can provide the most effective solution to your needs. We can start most investigations on an immediate basis and ensure the swiftest results. We guarantee the strictest confidence and confidentiality for all enquiries and investigations undertaken by us.
London Private Investigator Case Study
Identifying a Jewellery Thief Employee in Knightsbridge, London
Desperate for answers, a jewellery shop owner from Knightsbridge, West London, approached Bond Rees in January 2025 after experiencing huge losses after high-value stock suddenly began disappearing from the stock room. The jeweller worked at his business for several years selling luxury jewellery to wealthy customers in West London, over the past year however, our client began noticing stock discrepancies which cost him thousands.
What we did:
To begin, we met up with our client at a local cafe in Kensington to gather employment records, stock paperwork and advised a CCTV surveillance investigation was conducted to identify the thief.
Bond Rees surveillance team headed down to the jewellery store in Knightsbridge out-of-hours to avoid disruption and completed a detailed layout of where cameras were to be located. After cameras had been deployed discreetly in plant decor, behind mannequins and in the stockroom, the CCTV camera collected footage over the next 14-days.
During the surveillance investigation, PIs cross-referenced stock spreadsheets with employment history records to identify any patterns. A background check was conducted on employees that had joined the company over the past two years and databases revealed two employees had been convicted for theft in the past.
The Results:
After identifying two employees with prior criminal convictions, we compiled a complete report on the two employees for our client. CCTV footage revealed one of the two employees had been stealing stock from the stockroom during opening-hours and concealing them in work uniforms before smuggling the items into their bag. Our client was relieved to have found the suspect, and ensured to conduct a background check on every employee before hiring them.
Case Study: Preventing Intellectual Property Theft at Digital Agency
The Problem
A London-based web development agency discovered that a competitor had launched a sophisticated e-commerce platform featuring proprietary functionality remarkably similar to their flagship product—a bespoke inventory management system they’d spent two years developing. The timing was suspicious: the competitor’s launch occurred just weeks after one of their senior developers resigned to “pursue freelance opportunities.” With over £200,000 invested in development and their competitive advantage at stake, the agency needed concrete evidence to pursue legal action and protect their intellectual property.
What We Did
i-Spy Detectives initiated a comprehensive digital investigation focusing on the former employee’s activities during their notice period. Our cyber forensics team analysed company server logs, email communications, and file access records, revealing the developer had downloaded substantial code repositories to external drives during their final weeks of employment.
We conducted surveillance on the individual, documenting multiple meetings with principals from the competitor agency. Simultaneously, our technical analysts examined the competitor’s platform code (obtained through legitimate access) and identified striking similarities in architecture, commenting styles, and proprietary algorithms—clear indicators of copied intellectual property rather than coincidental parallel development.
The Outcome
Our detailed evidence package—combining digital forensics, surveillance documentation, and technical code analysis—provided the client with an overwhelming case. Faced with the evidence, the competitor agency agreed to an out-of-court settlement, ceased using the stolen code, and paid substantial damages. The former employee faced breach of contract proceedings. Our investigation enabled the client to protect their intellectual property, maintain their market position, and implement enhanced data security protocols to prevent future incidents.
Private Investigator London FAQs
Is it legal to hire a private investigator in London?
Yes, it’s completely legal. Every day in London people hire private investigators for a range of reasons. The important thing is to pick an investigations agency that complies with the UK laws on surveillance, data protection and evidence gathering. At iSpy Detectives, we do everything legally and compliant which means your clients do not have to worry about the legality of the same.
What is a private detective agency allowed to do?
A private detective in London who is regulated by law still possesses great powers which help them get their job done efficiently. This covers monitoring, vetting, Vehicle GPS Tracking (if allowed), web-based investigations, social media analysis and open-source intel. We do not hack or break into property, or use illegal tactics. However, our specialist training and technology can uncover information you cannot find out for yourself.
When should I consider hiring a private investigator?
Most people reach out to us when they want clear solutions but can’t find them themselves. You can trace someone where they are, perhaps you want to check your partner or employee is being honest, investigating a possible fraud and to check whether a business is legit Our London-based private investigators can provide you piece of mind if you are stuck, suspect anything or need assurance.
How much does a private investigator in London cost?
Price ranges differ regarding what you require. For instance, surveillance, tracing, background checks or corporate investigations each needs distinct time and resources. Some cases close in a few hours while others take several days. Call us for an immediate on the phone quote with no hidden fees. The price we quote is the price you pay. Once payment is received, we start immediately.
How discreet are your investigators?
Extremely. Our private investigators in London have assisted individuals and businesses including high-net-worth clients and well-known personalities with private and sensitive matters for years. All cases are managed quietly and professionally while your confidentiality is preserved at all times.
Do you take on investigations outside the UK?
Yes. We may be a London private investigations agency, but we also operate internationally. We have a network of detectives operating across Europe, North America, Asia, Middle East, Africa, and Australia. If you require tracking facilities for abroad, surveillance abroad or international people tracing services, we can manage the whole investigation.
Do you offer bug sweeping services in London?
We do. Our expert engineers conduct professional bug sweeps for hidden cameras, listening devices and tracking devices in your home, office, hotel room, rental vehicle, yacht or nursery. We have corporate clients, high-profile people and people that are handling sensitive information come to us for peace of mind and preventative security.
I think I’m being followed. Can you help?
Absolutely. Our TCSM counter-surveillance team all possess military and specialist security backgrounds. They will protect you in a discreet manner. We will identify if someone is following you or watching your activity and protect you accordingly. We have helped private individuals, film & music stars, corporate leaders, and political figures when in London.
What does a private investigator actually do day-to-day?
It is a varied role and depends on the investigations we are presented with. One day you might be conducting surveillance in central London, and another day could be spending time doing background checks, tracing a missing person or gathering evidence for a civil dispute. Our investigators also plan operations, analyse data, watch footage and create detailed reports. The tasks are different but always done with precision and discretion.
How long does a private investigation usually take?
There’s no fixed timeframe. Some jobs such as tracing cases can be solved within minutes, while surveillance jobs can take a few days. Complex business investigations, like corporate surveillance often take longer because they have more variables and moving parts to consider. As soon as we understand your goals, we will advise as to what is realistically achievable in a given time frame.
Can a private investigator find someone quickly in London?
Often, yes. Using specialist databases and having local knowledge and digital tools we are often able to located people a lot quicker than our clients expect. We can usually discreetly and effectively trace a missing relative, a debtor or someone who has dropped out of contact, with 48 hours.
Can a private investigator retrieve phone records and text messages?
Afraid not, and no legitimate investigator will claim they can. It’s against the law to access someone’s private messages without permission. We can collect other types of evidence by legal means such as footage, OSINT investigation, social media activity, background checks, and behaviour analysis.
However, we can investigate messages on business devices, such as phone and laptops, that are the property of the company. That is legally allowed because they are not owned by the individual.
Can evidence collected by a private investigator be used in court?
Yes, as long as it was collected legally. Our investigators adhere to stringent protocols to ensure that the evidence they collect is suitable for use in court cases and other legal disputes. This includes photographs, video footage, timestamped logs and witness statements.
Do you provide emergency same-day private investigator services in London?
Yes. We know that there are times when fast action is needed – if you need last-minute surveillance, urgent protection concern, employee issue, or personal one-off issue. Our team may provide same-day assistance if you require urgent help. Our London detectives operate 24/7 365 days per year.
Do you conduct cheating partner or infidelity investigations?
We do. Many people reach out to a London private investigator for this reason. Our approach is respectful and cautious. We give clients easy to understand evidence discreetly so they can make decisions on their relationships, with confidence.
Do you offer corporate investigations in London?
Yes. We help businesses of all sizes with employee misconduct, fraud, internal theft, IP theft, brand protection, due diligence checks, competitor intelligence (selling company secrets) and asset verification cases. Our corporate clients appreciate our confidentiality, rapid reporting and legally compliant approach.
Which areas of London do you cover?
Our London investigators operate across the city, including:
Central London Areas
Westminster, Mayfair, Soho, Covent Garden, Fitzrovia, Marylebone, Knightsbridge, Belgravia, Pimlico, Victoria, St James’s, Holborn, Bloomsbury, City of London (Square Mile), South Bank, Waterloo, Kensington, Paddington
West London Areas
Kensington, Chelsea, Fulham, Hammersmith, Notting Hill, Holland Park, Shepherd’s Bush, Chiswick, Ealing, Acton, Hounslow, Brentford, Richmond, Twickenham, Putney, Barnes
East London Areas
Shoreditch, Hoxton, Hackney, Bethnal Green, Whitechapel, Canary Wharf, Poplar, Bow, Stratford, Leyton, Walthamstow, Mile End, Dalston, Clapton, Newham, Barking, Dagenham
North London Areas
Islington, Camden, Hampstead, West Hampstead, Highgate, Kentish Town, Finsbury Park, Archway, Finchley, Barnet, Enfield, Muswell Hill, Crouch End, Tottenham, Wood Green, Alexandra Palace
South London Areas
Clapham, Brixton, Battersea, Wandsworth, Putney, Greenwich, Blackheath, Lewisham, Peckham, Dulwich, Camberwell, Southwark, Bermondsey, Croydon, Wimbledon, Kingston upon Thames, Tooting, Streatham, Crystal Palace.
We also work in Greater London and the Counties nearby. If you are unsure whether we cover your area, call us. Chances are we do.
Can you work without the person knowing?
Yes. Almost all private investigations rely on discretion. The subject will not be aware of our involvement, whether it is surveillance, tracing or background checks. Everything is handled quietly, legally and respectfully.