Lie Detector Test

Polygraph tests are a proven method of detecting dishonesty by monitoring physical factors such as breathing rate, pulse, blood pressure and perspiration.

Trained And Accredited Polygraph Examiners

Our polygraph examiners have undergone extensive training and years of experience in conducting polygraph tests to become fully qualified members of the British Polygraph Society (BPS) and the American Polygraph Association (APA). The APA is widely regarded as the world’s leading association dedicated to providing evidence-based scientific methods for credibility assessment.

We are a trusted provider of lie detector tests, all tests are done in complete privacy and can be done at a test centre or at home if necessary. The polygraph results will be handled in accordance with the Data Protection Act 2018. Physical (written report) and or digital copies of the results will be provided depending on your preference.

If you would prefer to have the Lie Detector Test conducted at your own home or another location, our lie detectors can travel to you. We will make this process as comfortable as possible whilst maintaining the highest level of accuracy.

  • Instant Results for your Lie Detector Testing
  • Discreet Booking & Invoicing
  • Fully Accredited Polygraph Testers (BPS & APA)
  • Highly Accurate Polygraph Testing
  • Nationwide Availability
  • Lie Detector Testing Completed in under 2 hours

Reveal PI Private Lie Detector Test and Polygraph Examinations

Reveal PI is one of the most respected providers of lie detection services in the UK. We conduct vast numbers of private lie detector tests every year helping our clients to finally get to the truth.

If you feel that someone close to you is lying about something and you want to find out what it is, our qualified polygraph examiners are here to help. It could be your partner, relative, employee or even a friend. Our main aim is to help you uncover the truth so that you can move on with your life.

Reveal PI offers both private and corporate lie detector tests. We have a team of fully qualified and accredited polygraph examiners who will be more than happy to help you. We understand that this is a sensitive case. It is part of our policy to handle all cases with the utmost care and discretion.

To learn more about our Reveal PI private lie detector tests and private investigation services or book one, please get in touch with us today.

Lie detector test
Lie detector test

How do Polygraph Lie Tests Work?

Polygraph or lie detector test UK work by monitoring the subject’s physiological reactions to questions. The questions asked during a polygraph test are designed to elicit a physiological response that can be measured and interpreted by a trained examiner. The most common response measures used in polygraph testing are changes in heart rate, blood pressure, and respiration.

The professional examiners will ask the subject both relevant and control questions during the test. Testing consists of relevant questions are those that pertain to the issue under investigation. Control questions are used to create a baseline response that can be compared to the subject’s responses to the relevant questions.

The polygraph examination will interpret the subject’s responses to determine if they are being truthful or deceptive. A truthful person will generally have similar physiological responses to relevant and control questions, while a deceptive person will react differently to relevant and control questions.

There are a variety of techniques that can be used in polygraph testing. What your polygraph expert will choose to use may vary depending on the circumstances.

Get in Touch to Discuss Your Needs

How could a Lie Detector help me?

I have trouble trusting my partner because I don’t think they are being honest.

Lie Detector Test

Recovering a relationship from a breakdown in trust is a struggle, taking years to rebuild. Once someone has shown they are capable of deceit, it can be hard to know when they are telling the truth. It leaves you to question your own judgment when you begin to trust them again. This is a normal response to protect yourself from further harm but can get in the way when you want your relationship back on track. If you have specific questions that need answering definitively, a lie detector test can help.

While it may seem drastic, polygraph examinations can offer peace of mind to both parties. By agreeing to a private lie detector test, a person shows they are willing to be questioned and give honest answers or face the consequences. We will gather your questions, and these will be asked by our licensed and accredited polygraph technicians at our testing facility. You will receive a report detailing the questions asked, the answers given and the measurements attributed to these answers.

Whether your partner lies during the test or not, these results offer certainty and confidence in your next decisions.

I want to prove to my family that I didn’t do something of which I have been accused of.

Lie Detector Test

When you are accused of something awful, your reputation suffers and your relationship with those closest to you can be deeply affected. Clearing your name can be difficult, especially in cases where evidence is hard to gather. While polygraph testing is often viewed as a way to catch people in their own dishonesty, they are used to prove an individual trustworthy. By asking specific questions about an event or action during a test, our trained technicians can monitor your physiological stress symptoms and create a report to show the honesty of your answers with a scientific method. If no answers are flagged as dishonest, your report will prove to your family that you are telling the truth about your actions.

We know something was stolen but we can’t prove who it was.

Lie Detector Test

In cases where you have multiple suspects and little evidence, it can be hard to see beyond hearsay and blame to find the truth of the matter. A lie detector test, while often relegated to the realms of spy movies, provides an objective, scientific method of uncovering dishonesty.

In a case like this, our practitioners would ask questions around the details of the theft, such as asking how much money was taken or how they opened the safe. This would enable them to observe whether or not the subject exhibits stress symptoms when asked about details only the thief would know. It might be that a practiced thief is also a practiced liar, so it is important to ask questions from multiple angles to see if their answers change or a particular formulation gives them away.

We would provide a report for each test, detailing the questions asked and answers given, and any answers flagged as causing high levels of stress to the subject, indicating a lie. These reports can give you the confidence to begin a criminal case or employment tribunal.

What our customers said

Lie Detector Test Case Studies

Is a Lie Detector Test the right way for your case? Read more about our use of polygraphs.

Did my husband have an affair?

When a husband with a checkered past came home from work late, his pregnant wife questioned him and was told he had been working late. Unbeknown to him, his wife had panicked when he wouldn’t answer her calls and driven to his office to see all the lights out and no sign of his vehicle. He claimed he was innocent and agreed to take a polygraph test but what did the results show?…
After a burglary at our clients premises the owner noticed that one of the burglars had turned the alarm off, there was no CCTV of the event but the owner had set the alarm personally so he knew it must have been deactivated. The police conducted their investigation and concluded there was a lack of evidence so the owner asked us to administer lie detector tests to a few of his staff. We asked the staff if they had…

Regaining Trust

Finding the truth about something that has happened in the past is notoriously difficult, especially when the event happened years ago. Our client had always been suspicious that their partner had lied about a relationship they had with an ex-partner, in particular whether that relationship was ongoing when they started theirs. The issue came up in arguments frequently and although it had been a number of years the issue was clearly not resolved, our clients partner sat a lie…

Corporate Services

Artboard 1

We assist employers, who might otherwise avoid investigating dishonest staff because they lack experience or fear legal action.

Artboard 1

Lying about injuries for financial gain creates stigma and undue stress for those who rely on compensation and injury payments.

private investigator

Becoming a victim of fraud can be stressful and financially devastating so investigating it professionally and effectively is vital.

Artboard 1

Process servers provide a trusted method of delivery that ensures documents have been received. 

Artboard 1

Mystery shoppers collect vital intelligence about the customers experience and can find evidence of unscrupulous retailers.

WPCCorporate Person Tracing

Enquiry agents can conduct covert and overt enquiries, obtaining additional information to support investigations.

Lie Detector Test FAQs

A polygraph test or lie detector test is a physical exam that records several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity in order to ascertain whether somebody is telling the truth.

You will be asked a series of questions during the polygraph examination. Changes to physiological responses will then be recorded directly onto the polygraph charts for review. Some of these changes may replicate those linked with truth or deception for many years.

Once the polygraph testing has been concluded, polygraph charts will then be generated by attaching four components to the subject.

No, there is no scientific proof to prove that polygraph tests are 100% accurate. The accuracy of lie detector tests is a controversial issue however it is widely regarded as a highly accurate method.

Although Polygraph Tests are only administered to willing participants, many still wish to give the perception they are telling the truth whilst continuing to be deceitful to the examiner.

People believe many techniques will enable them to cheat on a polygraph test. However, our examiners are experienced enough to identify these and react accordingly.



There is no difference. Lie Detector Tests are just a more commonly used name for Polygraph Tests as their primary purpose is to accurately detect deception.

Polygraph lie detector test results are not routinely used in courts. However, it depends on the type of court and the matter at hand. So, while there is no definitive answer, it seems that polygraph evidence is more likely to be admissible in U.K. courts if both sides agree to its use, and if the judge believes it to be reliable. It may also be used for specific incident testing.

Lie Detector Tests generally take between 1-2 hours. Our team of experts will send out a completed questionnaire in order to ensure you are eligible to take the test and agree with the specific questions to be answered. This saves time on the day of the test.

On the day of the test, we will explain how the exam works and ensure everybody is comfortable before we begin. Once the exam has started, we anticipate it will take no more than 90 minutes to complete.

Get in Touch

Related Articles

lie detector test
Lie Detector Test

Lie Detector Test Liverpool

Do you need help getting answers for an investigation in Liverpool?  Lie detector tests can be used to help solve a range of personal and

Read More »
lie detector test
Lie Detector Test

Lie Detector Test Manchester

Are you in search of lie detector testing in Manchester, UK?  Lie detector tests have long been the gold standard when it comes to finding

Read More »

Welcome Back to Reveal PI!

We’re thrilled to see you again and to show our appreciation, we’re offering you a 10% discount on your next inquiry. Use the code REVEAL10 when you get in touch.

Whether you’re seeking answers or peace of mind, our Team is here to provide the professional and discreet service you deserve.

Quote REVEAL10 to our team during your inquiry. We look forward to assisting you.