Centre for Forensic Neuroscience · South Yorkshire
Lie Detector Test Sheffield
Confidential polygraph examinations conducted personally by Dr Keith Ashcroft for relationship matters, disputed allegations, workplace investigations and legal instructions across Sheffield and South Yorkshire.
Every enquiry is personally reviewed before an appointment is confirmed.
- Personally Conducted
- No Subcontracting
- Private Offices
- Confidential Review
- Written Reports Available
Confidential advice from Dr Keith Ashcroft
07790 732828No obligation · Strictly confidential · Personally conducted examinations
Confidential Appointment Request
Request an Appointment
Requesting an appointment does not commit you to proceeding with a polygraph examination. Every enquiry is personally reviewed by Dr Keith Ashcroft to determine whether the matter is suitable and whether the proposed issues can be examined fairly, accurately and ethically.
You can request a confidential lie detector test in Sheffield online without first telephoning. An examination is not confirmed until suitability, consent, question formulation and practical arrangements have been reviewed.
Appointment Reservation
Appointments are secured with a £125 reservation retainer after the enquiry has been reviewed and accepted. It is a payment on account against the individually quoted examination fee and is credited against the balance due. It is not the examination fee itself: the total fee is quoted after the nature, scope and professional requirements of the instruction have been assessed.
Polygraph Examinations in Sheffield and South Yorkshire
Sheffield is the largest city in South Yorkshire and a major centre for legal, commercial and public-sector activity. The Centre for Forensic Neuroscience has provided lie detector tests across the region for over two decades, working with private individuals, solicitors, employers and safeguarding professionals. Every polygraph examination is conducted to the standards of the American Polygraph Association (APA) and is led personally by Dr Keith Ashcroft � one of the most experienced forensic polygraph examiners in the United Kingdom.
Appointments are held at professional meeting venues in and around Sheffield city centre, ensuring privacy and ease of access for clients travelling from Rotherham, Barnsley, Doncaster, Chesterfield and surrounding towns. We specialise in relationship and domestic matters, criminal defence and legal credibility assessments, and workplace investigations.
All polygraph examinations take place in a controlled, neutral venue. In accordance with APA recommendations, we do not conduct tests in domestic or residential settings, as the environment cannot be adequately controlled to ensure reliable results.
Sheffield is a dynamic city with strengths in advanced manufacturing, engineering, and a growing digital and creative sector anchored by two major universities. The city's diverse business community and public sector organisations create demand for polygraph services in workplace investigations, insurance claims, and personal matters.
Core Polygraph Services in Sheffield
We carry out specific-issue polygraph examinations for individuals, solicitors, employers, therapists and safeguarding professionals across Sheffield, Rotherham, Barnsley, Doncaster, Chesterfield, Worksop, Dronfield and the wider South Yorkshire region. Each examination follows a structured, evidence-based process from initial consultation through to the delivery of results.
Private & Relationship Matters
Confidential polygraph examinations addressing specific disputed incidents between partners, family members or associates. These assessments are investigatory in nature and provide structured, evidence-based information to support decision-making — they should be considered alongside other evidence and, where appropriate, professional counselling.
Learn MoreLegal, Criminal Defence & Solicitor Instructions
Solicitors, barristers and legal professionals can instruct the Centre for credibility assessments in criminal, civil, family and immigration matters. Cases involving allegations of sexual abuse are subject to enhanced procedures with two forensic polygraph examiners. Dr Ashcroft is qualified as an Expert Witness.
Learn MoreWorkplace, Corporate & Employee Theft Investigations
Polygraph examinations for private-sector employees under investigation for specific allegations of theft, fraud, misconduct, insider threats or breaches of trust. We also provide pre-employment screening for roles where trust and security are paramount.
Learn MoreSafeguarding & Post-Conviction Monitoring
We support safeguarding professionals through the child sex offender disclosure scheme and conduct post-conviction sex offender polygraph testing (PCSOT) in conjunction with therapists and probation officers. These examinations assist in managing risk to children and vulnerable adults and support treatment compliance in the community.
Learn MoreOur 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 question will ever be a surprise. This phase builds trust and ensures clarity.
Data Collection
During the in-test phase, approved questions are presented while advanced polygraph instrumentation records physiological responses. The process is conducted in a calm, professional manner.
Analysis & Reporting
Collected physiological data is analysed using validated scoring methods. Findings are communicated in accordance with the agreed scope; where that scope includes written reporting, a confidential professional report is prepared.
Preparing for Your Examination in Sheffield
Not sure whether a polygraph is appropriate?
Not ready to request an appointment? Provide a brief outline of the issue and Dr Keith Ashcroft will advise whether the matter may be suitable for a polygraph examination.
Fees and Venue Guidance
How Fees Are Quoted
Every polygraph examination is quoted individually. The fee reflects the nature and complexity of the issue, the preparation involved, travel and venue costs, and the reporting requirements of the case.
A straightforward private examination will attract a different fee to a legally instructed credibility assessment, a therapeutic disclosure session or a multi-subject workplace investigation. For solicitors and organisations, fees may be quoted on a case-by-case or professional day-rate basis.
The fee is always confirmed in advance, following a brief discussion about the circumstances of the matter, before any appointment is scheduled.
Examination Venues in South Yorkshire
Examinations in Sheffield are conducted at Regus Sheffield - Acero, 1 Concourse Way, Sheffield, S1 2BJ. This professional venue provides a private, controlled environment suitable for polygraph testing, with meeting rooms specifically configured for forensic examinations.
In accordance with American Polygraph Association recommendations, examinations are not conducted in domestic or residential settings. A controlled environment is essential for the reliability of the physiological data.
The date and time of examination are agreed between Dr Ashcroft and the instructing party during the initial consultation. Alternative venues may be arranged where required.
To receive a fee estimate, please contact us with a brief outline of the matter, preferred location and timescale.
Discuss Your CaseServing Sheffield and South Yorkshire
Our polygraph examination service extends well beyond Sheffield city centre. We regularly arrange confidential appointments at professional venues for clients based in Rotherham, Barnsley, and Doncaster, as well as towns such as Dronfield, Ecclesfield, Hillsborough and Chapeltown.
Whether you require a polygraph examination in Chesterfield or Worksop, or are a solicitor or employer based elsewhere in South Yorkshire, our administration team will identify a compliant, discreet testing facility nearby. Appointments can also be arranged for clients travelling from the Peak District and North Derbyshire. Please contact us directly to discuss local availability.
Why Choose Dr Keith Ashcroft?
Many polygraph providers in South Yorkshire do not disclose the identity or qualifications of the person who will conduct the examination. At the Centre for Forensic Neuroscience, every lie detector test in Sheffield is carried out personally by Dr Keith Ashcroft, Principal Forensic Polygraph Examiner.
Named, Qualified Examiner
Dr Ashcroft trained at American Polygraph Association–accredited and British Accreditation Council academies, with advanced instruction at the Behavioural Measures UK Polygraph Training Centre. Clients in Sheffield always know who is conducting their 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
Every examination must be voluntary. The Centre reserves the right to decline any instruction and will not accept cases where coercion, threats or punitive motives are identified. We operate with complete independence, impartiality and objectivity.
Confidentiality & Suitability
Each 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 and has provided testimony at Sheffield Crown Court and other judicial forums.
Lie Detector Test Sheffield: Frequently Asked Questions
We specialise in providing specific issue examinations using only accepted protocols and standards for our clients in Sheffield, 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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