High Accuracy Polygraph Lie Detector Tests in the UK

State of the art technology with 6 physiological monitoring sensors & 3D laser video camera to track facial movements.

Sometimes, you get a feeling that someone is lying to you. You might have confronted your partner to no avail. You even might have already employed surveillance but come back with no hard evidence. When you feel like you’ve exhausted all possible avenues and still can’t shake the feeling that you’re being lied to, you should consider a lie detector test.

We can also help you if you’re struggling to prove your innocence. If you’ve wrongly been accused of theft from the workplace, or your partner won’t drop the idea that you’re having an affair, a negative test result can go a long way to clearing your name.

Our polygraph examiners can conduct a quick, accurate and affordable lie detector test wherever you are in the United Kingdom. Call 0800 002 9558 to discuss our lie detection services for free. Alternatively, please contact us.

How does a lie detector work?

During the test, a trained interpreter uses a piece of equipment called a polygraph machine to measure subtle physiological reactions associated with lying. Lying causes a hormone called adrenaline to be released into the blood from the adrenal glands on the kidneys. Adrenaline causes your body to react in a variety of ways. We call this change in the body’s functions the “fight-or-flight” response.

Polygraph machines measure three physical factors associated with adrenaline. These are sweating, breathing, and heartbeat. Our device measures these through six different metrics: 

  1. Pulse rate. This is how fast someone’s heart is beating. It’s measured in beats per minute (BPM). Elevated adrenaline levels cause the heart to beat faster.
  2. Heart rate variability (HRV). This is a measure of how much the time between one heartbeat and another varies. It’s how we see whether someone’s heartbeat is speeding up or slowing down. HRV is especially useful in a lie detector test because it shows us precisely when someone begins to show a fight-or-flight response in the test.
  3. Blood pressure. This is how much force someone’s heart is using to pump blood around your body. The heart uses more force when adrenaline levels are high than when adrenaline is at normal levels.
  4. Skin temperature. Skin temperature directly correlates with how much adrenaline is in your blood. This is because adrenaline causes blood to be pumped around the body more quickly than usual. The increase in blood flow causes the skin to feel hot.
  5. Breath control. Because adrenaline causes blood to be moved around the body at an elevated rate, breathing depth and frequency also increase to keep up. Our machine measures these changes in breathing to determine whether or not there is a stress response taking place.
  6. Skin conductivity. When adrenaline causes someone’s bodily functions to speed up, body temperature increases. The body has to cool itself down when this happens, causing you to sweat. As well as water, sweat contains salts, making sweat conduct electricity more efficiently than usual moisture in the skin.

The polygraph machine uses tiny, painless electrical impulses to detect how well the skin is conducting electricity. The conductivity tells us how much someone is sweating and how their sweating changes in response to a question.

Our trained interpreters analyse the results of these tests on the body and pay attention to body language and certain vocal clues. They can use this to determine whether or not someone is giving a truthful answer to a question.

Some verbal signs of lying are helpful for you to tell whether someone might be lying to you, but they aren’t as valuable in a polygraph test. While bodily responses are things that they typically can’t control, the verbal signs of lying are subconscious attempts by the liar to ease their feelings of stress.

When we conduct a lie detector test, we want to ensure that a liar can’t ease these feelings. This need for a controlled test is why we limit our interrogation to yes/no questions. We only look for changes in vocal quality (the speed of the response and the pitch and tone of voice).

How much does a Polygraph lie detector test cost?

One lie detector test is Only  £350

  • Free Consultation
  • Client Confidentiality
  • Conducted at our own controlled office
  • Test duration: 45 mins
  • Same day/Next Day Service
  • Fixed fee service
  • No hidden costs
  • Wheelchair Access
  • £150 Deposit required to confirm booking

If you require more than one test, we can offer a bulk discount. Please give us a call on 0800 002 9858 to discuss pricing structures. Alternatively, please Contact Us.

What can the polygraph lie detector be used for?

  • Accusations of misconduct in the workplace
  • Cheating partner investigations
  • Accusations of infidelity
  • Family disputes
  • Accusations of theft
  • Moonlighting
  • Pre-employment screening
  • Evidence of sexual abuse
  • Clear your own name
  • Proving your innocence 


If you require more than one test, we can offer a bulk discount. Please give us a call on 0800 002 9858 to discuss pricing structures. Alternatively, please Contact Us.


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Call 0800 002 9858 to book a test or fill out a Contact Form, and one of our agents will get back to you.

When used properly by a trained interpreter, lie detector tests are accurate about 95% of the time. Polygraph machines aren’t mind-reading devices. We use them to measure the amount of bodily stress when answering questions.

Lie detector results are not admissible as evidence in any criminal courts in the UK. You won’t be able to use them as standalone evidence in civil courts either, but you might be able to use them to strengthen your case. It would help if you spoke to a solicitor to determine whether a lie detector test can help you with your civil case or tribunal.

You might assume that nervousness and social anxiety can give a false positive on a polygraph test, but this isn’t true. What we’re looking for in a test is a stress response when answering. A nervous person won’t suddenly show signs of stress when giving a truthful answer.

In rare cases, extreme anxiousness can make a test more difficult to interpret, but our interpreters run through control questions until they’re sure the subject is calm enough for an accurate read. They will also disclose the contents of the test beforehand to avoid surprising the subjects with questions.

It’s not possible to ‘beat’ a lie detector test by staying calm. If anything, this makes the polygraph results easier to interpret. It is theoretically possible to get away with lying on a polygraph test, but it would involve much practice with a cooperative, trained interpreter. If someone has never taken a polygraph test before, they almost definitely won’t be able to lie and pass.


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