Centre for Forensic Neuroscience · West Yorkshire
Lie Detector Test Leeds
If you need a lie detector test in Leeds, the Centre for Forensic Neuroscience offers confidential, professionally conducted polygraph examinations across Leeds and the wider West Yorkshire.
Every examination is carried out personally by Dr Keith Ashcroft, a Chartered Psychologist and Principal Forensic Polygraph Examiner. Private, legal, workplace and safeguarding matters are all accepted, subject to a preliminary suitability assessment.
Or call Dr Ashcroft’s team directly: +44 (0)7790 732828
Why Choose Our Leeds Lie Detector Test Service?
The Centre for Forensic Neuroscience has provided lie detector tests in Leeds and across West Yorkshire for over two decades. Our polygraph examinations are conducted to the standards of the American Polygraph Association (APA) and are led personally by Dr Keith Ashcroft — one of the most experienced forensic polygraph examiners in the United Kingdom.
Whether you are a private individual seeking clarity on a personal matter, a solicitor preparing a case, or an employer addressing a workplace concern, our Leeds service is designed to be thorough, discreet and professionally managed at every stage. We specialise in relationship and domestic matters, criminal defence assessments, and workplace investigations.
All examinations take place in a suitable, private venue within the Leeds area. In accordance with APA recommendations, we do not conduct polygraph tests in domestic settings.
Lie Detector Test Leeds: What We Provide
We provide specific-issue lie detector tests and polygraph examinations for individuals, solicitors, employers, therapists and safeguarding professionals across Leeds, Bradford, Wakefield, Huddersfield, Halifax, Harrogate, York and the wider West Yorkshire area. Every examination follows a structured, transparent process.
Private & Relationship Matters
Confidential examinations addressing specific disputed incidents between partners, family members or associates. These are investigatory in nature and should be considered alongside other evidence.
Learn MoreLegal & Solicitor Instructions
Solicitors, barristers and legal professionals may instruct the Centre to conduct credibility assessments in criminal, civil, family and immigration matters. Allegations of sexual abuse are subject to enhanced procedures.
Learn MoreWorkplace & Employer Investigations
Polygraph examinations for private-sector employees under investigation for allegations relating to theft, fraud, misconduct, insider threats or breaches of trust.
Learn MoreSafeguarding
We support the child sex offender disclosure scheme and work with safeguarding professionals where polygraph examinations may assist in managing risk to children and vulnerable adults.
Therapeutic Disclosure
Referrals from therapists for clinical and therapeutic polygraph examinations, including disclosure, sobriety monitoring and treatment compliance in addiction and recovery contexts.
Learn MorePost-Conviction Monitoring
Post-conviction sex offender polygraph testing (PCSOT) conducted in conjunction with therapists and probation officers to support risk management in the community.
Our Commitment to Every Examinee
Preparation & Process
A transparent, step-by-step psychological assessment framework. We ensure all examinees fully understand the process, promoting maximum reliability.
Pre-Test Consultation
We review background case facts, confirm medical and psychological suitability, and explicitly discuss privacy, confidentiality, and consent boundaries before any testing begins.
The Pre-Test Interview
The most critical and comprehensive phase. The examiner thoroughly discusses every question to be asked during the exam. No surprise questions are ever asked.
Data Collection
Specialized, non-invasive sensors are attached to record biometric data (respiration, electrodermal activity, cardiovascular parameters) while the exact agreed-upon questions are asked.
Analysis & Report
The examiner analyzes physiological charts using sophisticated forensic scoring algorithms. A comprehensive, confidential written report is subsequently produced.
Examinee Preparation Checklist
Unsure if you qualify?
Take our secure, 2-minute eligibility questionnaire to find out.
Fees and Venue Guidance
How Fees Are Quoted
Polygraph examination fees are quoted individually because the cost depends on the nature of the issue, the complexity of the case, preparation time, travel requirements, venue or meeting room costs, and reporting needs.
A straightforward private examination will differ from a legally instructed matter, a therapeutic disclosure session, or a workplace investigation. For solicitors, employers and organisations, fees may be quoted on a case-by-case or professional day-rate basis.
The fee will always be confirmed in advance, after a short discussion about the circumstances, before any appointment is agreed.
Examination Venues in West Yorkshire
Examinations should be conducted in a suitable, private and controlled environment. We arrange neutral professional venues in Leeds and across West Yorkshire, including meeting rooms and clinic settings where appropriate.
In accordance with American Polygraph Association recommendations, we do not conduct examinations in domestic (home) settings, as it is rarely possible to control the environment to a satisfactory degree.
The venue, date and time are agreed between Dr Ashcroft and the instructing party during the initial consultation.
To receive a fee estimate, please contact us with a brief outline of the matter, preferred location and timescale.
Request a Confidential QuoteWhy Choose Dr Keith Ashcroft?
Many providers do not disclose the name or qualifications of the examiner who will conduct your lie detector test. At the Centre for Forensic Neuroscience, every polygraph examination in Leeds is conducted personally by Dr Keith Ashcroft, Principal Forensic Polygraph Examiner.
Named, Qualified Examiner
Dr Ashcroft is trained at American Polygraph Association–accredited and British Accreditation Council academies, including advanced training at the Behavioural Measures UK Polygraph Training Centre. You will always know who is conducting your examination.
Professional Memberships
Member in good standing of the American Polygraph Association, National Polygraph Association (USA), Director of the UK Polygraph Association, American Association of Police Polygraphists, the Society for Psychophysiological Research, and the Society of Forensic Interviewers.
Ethical Boundaries
All examinations must be voluntary. The Centre reserves the right to decline any instruction, and does not accept cases where coercion, threats or punitive motives are suspected. We are independent, impartial and objective.
Confidentiality & Suitability
Every case is pre-screened for medical, psychological and ethical suitability before any appointment is confirmed. Results and reports are handled with complete discretion. Dr Ashcroft is also qualified as an Expert Witness.
Lie Detector Test Leeds: Frequently Asked Questions
OUR POLYGRAPH
EXAMINATION
SERVICES
21 Specialized Protocols
ASTM E52
100% Compliant
Committee E52 On
Forensic Psychophysiology
DOMESTIC POLYGRAPH EXAMINATIONS
Domestic polygraph examinations are those in which the examinee and the examiner address specific issues that involve the credibility of statements regarding interpersonal behaviour between spouses, live-in partners, non-domiciled marital or intimate partners, children, parents, extended family members and blended family members. The purpose of this process is to investigate a disputed incident, not to address suspicions or doubts. We recommend that all participants actively engage in counselling. The results of these tests are based on the interpretation of physiological data, so they are investigatory. Other evidence should be considered before taking action.
Learn MoreSAFEGUARDING POLYGRAPH EXAMINATIONS
We strongly support the child sex offender disclosure scheme, often referred to as 'Sarah's Law', which allows parents, carers or guardians to formally request the police for information about a person who is in contact with their child or a child close to them if they're concerned the person may be a significant risk.
QUALITY CONTROL
Providing independent quality control of reviews of polygraph examinations (International).
TRAINING
Provide training/lectures on polygraph-related subjects.
SEXUAL ABUSE AND VIOLENCE
Polygraph examinations may assist in assessing the credibility and consistency of a disclosure or written statement made by an alleged victim of sexual abuse or violence. Findings are investigative in nature and should be considered alongside other available information and evidence.
Learn moreEMPLOYEE THEFT
Polygraph testing is for private-sector employees who are under investigation for allegations relating to economic losses to their employers.
INSIDER ATTACKS
Prevention, detection and investigations of insider attacks.
SEX ADDICTION - CLINICAL AND THERAPEUTIC POLYGRAPH EXAMINATIONS
The polygraph is used within a therapeutic setting to assist in disclosure, sobriety and relapses in sex addiction, as well as treatment resistance, etc. We receive referrals from various therapists who offer proven psycho-educational programmes for the treatment of sex and pornography addiction and support programmes for partners. Please note that we cannot be instructed in cases where the partner views a polygraph interview and examination as the only way of regaining trust (there must be additional sources). In addition, there must not be any evidence of punitive/vindictive motives as opposed to therapeutic considerations for seeking a therapeutic polygraph. We are associate members of the Association for the Treatment of Sexual Addiction and Compulsivity.
Learn MorePRE-EMPLOYMENT ADVANCED SCREENING SOLUTIONS
We specialise in providing confidential, scientifically grounded screening services designed to mitigate risk and protect the integrity of your organisation. We partner with both public and private sector companies to build safer, more secure, and trustworthy workplaces. For example, we use the Test of Espionage and Sabotage (TES) in roles where national security, protection of intellectual property, or critical infrastructure is paramount; our TES polygraph examinations serve as a critical layer of due diligence. This specialised protocol is designed to address severe insider threats, providing organisations with an additional structured source of risk-related information for positions demanding the highest clearance of trust.
Learn MorePAIRED TESTING (Marin Protocol)
When two individuals provide contradictory accounts of the same event, independent polygraph examinations may provide additional investigative information to assist decision-makers. This approach is particularly effective in mediation contexts and disputed allegations.
Learn MoreASSET FORFEITURE ASSESSMENT
For identifying concealed assets.
WRONGFUL CONVICTIONS EXONERATIONS
Polygraph testing for those who have been granted leave to appeal (N.B. ~ in the UK, this cannot form the basis of an appeal against conviction) (Pro Bono).
PROFESSIONAL MISCONDUCT
Polygraph testing is performed for those who are alleged acts committed misconduct or those who are accused of the same.
IMMIGRATION, SHAM MARRIAGES AND ASYLUM
Polygraph examinations may assist legal representatives and decision-makers by assessing the consistency and credibility of specific statements within an immigration, sham marriage, or asylum matter. Findings are investigative in nature and should be considered alongside documentary evidence, interview records, country evidence, witness evidence, and other relevant information. A polygraph examination does not determine asylum validity or conclusively verify the truth of a claim.
CRIMINAL DEFENCE
Forensic / Criminal matters: such as homicide, sexual violence, theft, fraud, sabotage, espionage, and cases involving cyber psychology. Allegations of sexual abuse are subject to our enhanced service with two forensic polygraph examiners. CFN provides solicitors and lawyers with an assessment of the credibility of defendants and witnesses in criminal matters.
Learn MorePOST-CONVICTION SEX OFFENDER CREDIBILITY ASSESSMENT
To effectively manage sex offenders in the community. Examinations for Denial, Sexual History and Maintenance/Monitoring, which is conducted in conjunction with Therapists and Probation Officers. The main aim of Post Conviction Sex Offender Polygraph Testing (PCSOT) is to keep the public safe. The process may assist professionals in identifying, monitoring, and managing risk-related disclosures and compliance issues. This helps professionals to better manage and treat convicted sex offenders in the community.
INTELLIGENCE VERIFICATION
Polygraph testing to assess the value of critical intelligence sources.
SPORTS INTEGRITY CREDIBILITY ASSESSMENT
Dr. Ashcroft is a globally recognised leader in forensic psychophysiology, offering specialised expertise in polygraph testing and forensic credibility assessment, along with credibility assessments. With a career spanning decades, Dr Ashcroft has conducted investigations worldwide, providing critical support in high-stakes sports legal matters on an international scale. His services include advanced polygraph examinations to address issues such as doping allegations, match manipulation, and breaches of sporting integrity, as well as serving as an expert witness at the Court of Arbitration for Sport (CAS), where his testimony has helped resolve landmark cases.
Learn MoreEXPERT WITNESS TESTIMONY
I specialise in providing expert witness testimony internationally on matters relating to credibility assessments and their related technologies.
MEDIA & FILM SET HIRE, CONSULTATION
We have extensive experience collaborating with major film directors, including Oliver Stone (known for films such as Snowden), while working internationally and offering reliable services like Lie Detector Test Leeds for various professional needs.
Learn MoreFISHING TOURNAMENTS
We apply polygraph examinations to investigate competitor rule violations.
We specialise in providing specific issue examinations using only accepted protocols and standards for our clients in Leeds, UK, according to the American Polygraph Association and ASTM International (committee E52 on Forensic Psychophysiology). We employ strict quality control procedures, as well as using two examiners to confirm results. Our state-of-the-art computerised polygraph systems, such as the Limestone Paragon X Acquisition System, have a high-resolution 32-bit analogue-to-digital conversion for superior recording and analysis capability for all casework.
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