Private Investigator London
For Fast, Accurate, & Irrefutable Evidence

Regain Control with the Proof You Need

Private Investigator in London for Fast, Accurate, and Irrefutable Evidence

Regain Control with the Proof You Need

Speak to our Private Detectives in London & the UK

Uncover deceptions

Protect your interests

Gain peace of mind

National Private Investigators in London are a professional team of diligent, specialist, private detectives operating throughout the UK who believe that getting to the truth of the matter is vital. Sometimes we all need answers and establishing the facts can be difficult, so our investigation services can help whether you have suspicions about a spouse, employee theft, an insurance claim or any other situation where you suspect illicit behaviour. So contact us to today, as your private investigators in London we can help you with everything from local to UK-wide surveillance.

Proving the Truth Isn’t Easy – Especially When Someone’s Trying to Hide it From You

Deception hurts. It can decimate a business and destroy personal lives. Once you know the facts, you can at least take your next step with confidence. But when you can’t gather the proof you need to confirm your suspicions, you end up stuck, frustrated and vulnerable. Doubts drain our energy, cloud our thoughts and lead to risky decision-making. National Private Investigators help you make sure your next move is clear and confident – not a high-stakes gamble on what your gut tells you is the truth but you can’t yet prove.

Private Surveillance Reviews

Our proven track record

Ukent Milwood
Ukent Milwood
I can truly say that I have received a 100% service. Jack took the time to call me. He was polite, courteous and attentive to my needs. The best type of service for my needs and within no more than a few hours I had a full report, if you ever need a private investigating service, I would encourage you to use National Private Investigators. Thank you, Jack and your team.
Steve Bayley
Steve Bayley
I would recommend NPI when hiring a private investigator. A very happy customer.
Aprile Merriman-Bayley
Aprile Merriman-Bayley
Hired them for a Surveillance job and i was extremely impressed with the evidence they got.
Hired Jack for a bug sweep and he came out the same day, brilliant service.
Bex Pashley
Bex Pashley
Jack was polite, honest and knowledgeable. He talked me through each stage and I knew what was happening at each stage. Can’t thank him enough.
George West
George West
A great private investigator. Jack was quick and efficient to deal with any questions I had. Would highly recommend.
Great experience with Jack. He was very professional throughout the whole experience. Myself and my partner required his services immediately and he came asap. He was extremely professional and understanding of our situation. I would highly recommend his services :)
Jen Fyfe
Jen Fyfe
A very professional experience. We found ourselves in a difficult predicament with a legal matter that required some expert input. Jack provided this efficiently, quickly and was very helpful throughout. I wouldn’t hesitate to recommend. Thanks very much.
James Hofman
James Hofman
I hired Jack to trace a debtor for me. He found them the very same day and I’ve now started litigation. Thank you Jack. A top rate service.
Luke Annan
Luke Annan
I couldn’t be happier with the service with NPI. Very professional and everything was explained really clearly. Great work! Would highly recommend!
I'm very happy with the work provided from National Private Investigators. I would highly recommend their service. Thank you!
David G
London UK
Excellent service throughout, we were kept up to date on the investigation every step of the way. We couldn't have asked for more.
Lucy E
Cambridge UK
Amazing result! As a business, we've worked with a few companies over in the years, and NPI get the job done. Highly recommended!
Johnathan M
Greater London UK

At National Private Investigators (NPI) We Get the Answers Beyond Your Reach

We uncover the truth. We work with corporate, insurance and individual clients to deliver the evidence you need to protect yourself and make the right decisions. Armed with accurate, comprehensive and reliable information from many different sources, you’ll have the conclusive proof you’ve been looking for.  We employ a range of different evidence-gathering tactics and techniques to get the results you need, fast. They include:

Private Investigation Services

Highly Skilled, Experienced Private Investigators Who are Top of Their Game.

Our team of private investigators have many years of military reconnaissance experience and have been extensively trained in surveillance and investigation techniques. We work with absolute discretion and ensure professionalism and attention to detail at every step. We’re so confident in the level of service we offer that we even offer a full refund should our cover ever be blown on your job.

What You Need to Know Before Hiring a Private Investigator

There are many unqualified, inexperienced private investigators in the market. When looking to hire a private investigator in London, the UK or overseas, first confirm they are members of the following associations – the Investigators Institute of Professionals (IPI), the Association of British Investigators (ABI) and the World Association of Professional Investigators WAPI. NPI is a member of all three and you can read more about our strict code of conduct here.

When looking to hire a private investigator in London, make sure the company is a member of the following associations, IPI, ABI & WAPI.

Private Investigators London

With Your Best Interests at Heart

When employing a private investigator we know your anonymity is a major concern to you. We take this extremely seriously.  Absolute discretion is a must. We’re so confident of our ability to go un detected and believe in our own discretion that much we are willing to guarantee it.

100% no Quibble, Money Back Guarantee if We are Compromised While Working for You

At National Private Investigators, we prioritise your peace of mind and confidentiality above all else. We understand that when you hire a private investigator, maintaining your anonymity is of utmost importance. Rest assured, we take this responsibility incredibly seriously.

This is Our Unwavering Promise to You.

When you choose National Private Investigators, you can trust that your best interests are at the core of our work. Our team of highly skilled and experienced investigators have your back every step of the way. From conducting thorough investigations to gathering evidence, we go above and beyond to ensure your goals are met with the utmost professionalism and integrity.
You can rely on us to handle your case with the utmost confidentiality, keeping your identity and personal information completely discreet. Our track record speaks for itself, as we have successfully assisted all of our clients in maintaining their privacy and obtaining the answers they seek.
Don’t settle for less when it comes to your privacy. Choose National Private Investigators, where your anonymity is our top priority.

We Do the Right Thing By You, and Have Your Best Interests Front of Mind.

What really sets us apart from other private investigators in London and the UK is that we care. Unlike many private investigators, we work ethically, within the law and always with complete transparency. You’ll know exactly what we’re doing, why and when and we’ll always suggest ways we can add value into your service. It’s this approach that has earned us a reputation for outstanding excellence within the industry. We’ve successfully conducted hundreds of investigations for individuals and businesses, delivering accurate and reliable results that have prompted dozens of 5-star reviews.

Need The Real Truth?

Step 1. Contact Us.

Get in touch for a FREE, no obligation, confidential consultation. Share your situation, the challenges you face and the goals you want to achieve from your investigation.

Step 2. Set the strategy.

We will recommend a bespoke strategy and tactics for your case, drawing from our broad range of services. We provide clear pricing and agree your plan before moving forward with the investigation.

Step 3. Get the intel.

Our skilled private investigators will conduct a discreet, thorough and professional investigation, providing an accurate and reliable report within 24 hours of completion, so you can see clearly work carried out alongside evidence and insights gathered.

Private Investigators UK

We conduct a variety of Private Investigations including those related to infidelity, child custody, cohabitation and more.

Our corporate investigators help corporate entities identify emerging risks so that they can take appropriate steps to protect themselves and their interests.

Personal injury claims are one of the most common types of fraudulent insurance claims. By surveilling someone we can help you determine if that person is truly injured.

Insurance fraud alone costs UK businesses billions of pounds per year in losses. If you suspect someone is filing a fraudulent claim, our fraud investigations team at NPI can help.

Whether you need to track down a debtor, a contractor who did shoddy work or a loved one who suddenly vanished, our highly-trained tracking agents can find them.

We employ a variety of leading-edge and long-established techniques and technologies to find out if the person you are about to put in a position of trust is worthy of that trust.

Sometimes it’s unwise to get too close to someone being surveilled. A better approach is to attach a GPS device to their vehicle and track their movements remotely.

Our expert bug-sweeping service exposes digital spying and listening devices no matter how cleverly they have been hidden in your home, business or vehicle.

People lie for any number of reasons, but if you have placed them or intend to place them in a position of trust you need to know if what they’ve told you about themselves is the truth.

Don't Let Your Suspicions Go Unanswered Any Longer.

Private Investigators in London

If you are hiring a private detective for the first time, we will make the experience both positive and productive. Prioritising your privacy, National Private Investigators ensures that the data gathering process is confidential, discreet and completely legal, so you are able to use the information in whichever way you need. Our expert investigations can supply the essential evidence to help you in a difficult situation. 

This means that no matter where your suspicions lie, we will have the right person for the job. You will be working with a dedicated case manager who will gather all the details necessary from you in order to deliver a timely and comprehensive result. If you are searching for answers and require the right information, we are here to help. 

With a range of diverse experience in all areas, our private investigators are ready to support you with a fully broken down pricing structure and total transparency, from start to finish. After all, we know better than anyone that honesty is the best policy. 

Contact us now for a free and completely confidential consultation – whether you are in the early stages of considering a private investigator or you’re ready to get to work, let’s talk about what we can do for you.

An Invaluable Ally in Your Quest for the Truth

The job of the Private Detective in London is to protect the interests of their clients, much the same as lawyers do. We protect those interests by ensuring our clients have dependable, timely, and factual information on which to base their decisions and strategies. We obtain that information through a combination of state-of-the-art investigative technologies and tried and true boots on the ground methods.

At National Private Investigators our goal is to be an invaluable ally in your quest for the facts. Every one of our investigations is conducted with unassailable integrity and thoroughness. We use every tool at our disposal to root out nefarious agendas and those behind them, while at the same time respecting both the letter and spirit of the law. In the end, the information we uncover enables our clients to remain one step ahead of those who would do them personal harm or undermine the integrity of their business.


The Final Report

After our Private Investigators in London has completed their investigation they waste no time in issuing a final report. In fact, the client can expect to receive the final report within 24 hours of the conclusion of the investigation.

While it is not our job to make judgments regarding the people being investigated, we are mindful that the final report can, in some ways, be the most difficult part of the process since it often includes information that confirms our client’s worst fears.

Because of this, we remain accessible in the period following the issuance of the final report in order to handle questions or clarify various aspects of the report in order to help put the client’s mind at ease.

About National Private Investigators

Stepping into the world of private investigation, it’s common to be met with a haze of scepticism and doubt. An industry that should be built on trust often finds itself mired in doubt and uncertainty. That’s why, in March 2016, driven by my personal experiences in a covert reconnaissance unit of the British Army, I took it upon myself to illuminate this dimly lit path. Thus, National Private Investigators was born.


The British Army’s covert reconnaissance taught me many things – discipline, attention to detail, and, above all, integrity.

These core values were noticeably missing in many other agencies and corners of the private investigative world. Seeing this disparity, I was compelled to take action, hoping to meld my military expertise with a sincere commitment to honesty in civilian service.

At National Private Investigators, our guiding principle is clear and unwavering: the pursuit of truth. We’re not here to offer investigative services but to revolutionise them. Our mission is grounded in putting people’s rights and interests at the forefront of everything we do.

Our ultimate aim is to usher in a new era of private investigation, where each step is taken with sincerity and genuine service.

We’re not only reshaping the private investigation industry; we’re actively striving to purge it of unethical practices that have tainted its reputation for far too long. Our vision is clear: a realm of investigation where every client, irrespective of their stature, can step in with confidence. Whether you’re a multinational corporation or an individual seeking answers, at National Private Investigators, you’re promised transparency, integrity, and compassion.

Our team is our pride. A collective of seasoned and fully trained professionals, each a master in their domain. Be it intricate surveillance operations, meticulous background checks, or the delicate task of people tracing – we have experts for every need. What’s more, every member of our dedicated team is bound by our shared ethos – to transform and uplift the investigative industry, bridging trust gaps and fostering genuine connections.

Beyond our primary services, we’re passionate about educating our clients and the general public about the importance of ethical investigative practices. We host workshops, webinars, and interactive sessions, ensuring that the values we stand for are disseminated far and wide.

Looking forward, our goals are ambitious but straightforward. We aim to be the gold standard when it comes to private investigation work – setting benchmarks not just in results, but in the approach, ethics, and relationships we build along the way. With technology and methods evolving, so do we. Staying updated with the latest techniques, tools, and training, we’re ever-ready to serve in the best possible way.

National Private Investigators is not just about conducting investigations; it’s about establishing a legacy. A legacy where honesty isn’t the exception but the norm. If you’ve been seeking an investigative partner who values the truth as much as you do, your search ends here. Join us in our quest for truth and transparency.

Time to Stop Stressing and Put Your Fears to Bed Once and for All.

Contact National Private Investigators today. It’s time to get the concrete evidence you need to protect yourself and regain the control you deserve. In the meantime, download our guide Your Data In The Shadows – See What The Dark Web Is Sharing About You to find out just how vulnerable you are right now. Discover the tactics investigators use to drill down intoidentity and background checks. And for the proof – and the peace of mind – you deserve, book a call with one of our London based private investigators today.

Case studies

Trust in our expertise. We prioritise ethical practices and the highest standards of professionalism in all our undertakings. We’re here to help and guide you every step of the way.


Proactive TSCM Service

A prominent property acquisition company, known for securing and developing high-value estates, had a strategic edge thanks to its ability to identify and close deals

Read More

Frequently Asked Questions

Pricing for private investigator services varies based on your needs. We offer a cost effective solution and comprehensive details can be found on our pricing page.

Absolutely! Engaging the services of a private investigator in the UK is perfectly legal, provided the investigator adheres to all relevant laws during the inquiry.

Private investigators wear many hats. In essence, they are responsible for obtaining information and procuring evidence tailored to the client’s requests.

We offer a full range of specialised services to meet varied needs. A comprehensive list can be found on our services page.

No. It’s unlawful for investigators to photograph individuals inside their homes without consent. While they can capture images from public spaces, infringing on one’s private space, such as taking photos through windows, is a breach of privacy rights.

Typically, this involves a trace search. We utilise a myriad of databases, including credit data and Open Source Intelligence (OSINT), to identify all potential contact points.

In most situations, no. Access is only permissible in fraud-related cases where it’s been officially reported, and a valid fraud number is provided.

Investigators can only access text messages via device data forensics, and this requires ownership of the device and a valid, lawful reason for inspection. Unauthorised remote access is prohibited.

Ideally, a full name, date of birth, and last known address are helpful. However, with just a full name, we have the expertise to assist you.

With access to numerous databases and extensive experience, we can efficiently trace individuals. Simply provide the name, and we operate on a “no search, no fee” basis.

Yes, private investigators are legally permitted to operate in the UK, so long as the intention for hiring them is lawful.

Private investigators are professionals trained, often with police or military backgrounds, to gather evidence, intelligence or information for their clientele.

Private investigators are bound by the law and are prohibited from any illegal activities in their operational country.

No. Medical records are confidential, and private investigators cannot access them.

Absolutely not. Tapping phones or hacking into devices is illegal and not a service we offer.

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