Study guide
6.6 Visual Identification & Turnbull Guidelines
UK Bar — Criminal Litigation, Evidence and Sentencing Exam
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1 Chapter 1: Introduction & BSB Assessment Overview
1.1 BSB Centralised Assessment Structure & Regulations 1.2 Overriding Objective & Court Structure 1.3 Classification of Offences, Court Jurisdiction & Funding
2 Chapter 2: Commencing Proceedings, Charges & Allocation
2.1 Commencing Proceedings & Police Station Procedure 2.2 First Hearing & Classification of Offences 2.3 Allocation and Mode of Trial 2.4 Sending for Trial & Committal for Sentence 2.5 Youth Court & Special Allocation Rules 2.6 Sentencing Powers of the Youth Court
3 Chapter 3: Bail, Remand & Case Management
3.1 Right to Bail & Statutory Exceptions 3.2 Bail Conditions, Breach & Appeals 3.3 Remands, Adjournments & Custody Time Limits 3.4 Case Management & Pre-Trial Hearings 3.5 Prosecution & Defence Disclosure
4 Chapter 4: Indictments & Preparation for Trial in the Crown Court
4.1 The Indictment: Form, Content, Time Limits & Specimen Counts 4.2 Joinder, Severance, Amendment & Voluntary Bills 4.3 Arraignment, Pleas & Change of Plea 4.4 PTPH, Applications to Dismiss & Offering No Evidence
5 Chapter 5: Criminal Evidence — General Principles & PACE Exclusions
5.1 Preliminary Evidential Matters: Relevance, Admissibility & Tribunals 5.2 Burden and Standard of Proof & Presumptions 5.3 Confession Evidence & Mandatory Exclusion 5.4 Discretionary Exclusion of Unfair Evidence 5.5 Inferences from Silence
6 Chapter 6: Special Evidentiary Rules — Hearsay, Character & Identification
6.1 Hearsay Evidence & The Four Gateways 6.2 Hearsay Safeguards, Multiple Hearsay & Procedure 6.3 Defendant Bad Character Evidence 6.4 Non-Defendant Bad Character & Co-Defendant Character 6.5 Good Character, Proof of Convictions & Bad Character Procedure 6.6 Visual Identification & Turnbull Guidelines
7 Chapter 7: Witnesses, Privilege & Opinion Evidence
7.1 Witness Competence, Compellability & Special Measures 7.2 Oaths, Affirmations & Compelling Witness Attendance 7.3 Examination in Chief: Leading Questions, Memory Refreshing & Hostile Witnesses 7.4 Cross-Examination, Previous Inconsistent Statements & Re-Examination 7.5 Opinion Evidence & Expert Witnesses 7.6 Privilege, Public Interest Immunity & Immunity
8 Chapter 8: Trial Procedure in the Magistrates' Court & Crown Court
8.1 Magistrates' Court Trial Procedure 8.2 Summary Trial: Pre-Trial Rulings, Absence & Abuse of Process 8.3 Crown Court Trial Procedure 8.4 Jury Trial: Absence, Unrepresented Defendants & Abuse of Process 8.5 Speeches, Summing Up & Verdicts
9 Chapter 9: Sentencing Framework & Guidelines
9.1 Sentencing Framework, Principles & Procedure 9.2 Seriousness, Guilty Plea Reduction, Aggravation & Mitigation 9.3 Sentencing Procedure: Newton Hearings, Reports & Goodyear Indications 9.4 Custodial Sentences, Suspension & Release 9.5 Mandatory & Minimum Custodial Sentences 9.6 Community Orders, Fines & Discharges 9.7 Ancillary Orders, Costs & Dangerous Offenders
10 Chapter 10: Appeals & Post-Trial Remedies
10.1 Appeals from the Magistrates' Court (Crown Court & High Court Case Stated) 10.2 Rectifying Mistakes, Case Stated & Judicial Review 10.3 Crown Court Appeals (Court of Appeal Criminal Division & Supreme Court) 10.4 CACD Procedure: Rectification, Leave, Renewal, Loss of Time & Fresh Evidence 10.5 Prosecution Appeals, Attorney General's References & the CCRC
6.6 Visual Identification & Turnbull Guidelines
Key Takeaways Explain This Topic AI
The Turnbull guidelines (R v Turnbull [1977]) apply whenever the prosecution case depends wholly or substantially on visual identification evidence that the defence claims is mistaken.
The quality of visual identification is assessed using the ADVOKATE mnemonic: Amount of time, Distance, Visibility, Obstructions, Known or seen before, Any reason to remember, Time elapsed, and Errors/discrepancies.
Where visual identification evidence is assessed as poor (weak ID) and is unsupported by independent corroborative evidence, the trial judge must withdraw the case from the jury at the close of the prosecution case under the second limb of R v Galbraith.
If weak identification evidence is supported by independent evidence (such as DNA, fingerprints, CCTV, or admissions), the judge should leave the case to the jury with a specific Turnbull direction highlighting the weaknesses and pointing to the supporting evidence.
Code D of PACE 1984 sets out mandatory statutory procedures for identification (including VIPER video identification), and failure to follow Code D may result in exclusion of identification evidence under Section 78 PACE 1984.
Last updated: August 2026
6.6 Visual Identification & Turnbull Guidelines
Visual identification evidence has historically been recognized as one of the most potent yet dangerous forms of evidence in criminal trials. Misidentification by honest, convincing, but mistaken witnesses is the single leading cause of wrongful convictions in English legal history (as highlighted by the landmark Devlin Committee Report on Evidence of Identification in Criminal Cases in 1976). To combat this danger, the Court of Appeal established binding procedural rules in the seminal authority R v Turnbull [1977] QB 224 . These guidelines govern how judges must assess visual identification evidence, when cases based on weak identification must be withdrawn from the jury under R v Galbraith [1981] 1 WLR 1039 , and how juries must be directed. This section provides an exhaustive examination of the Turnbull guidelines, the ADVOKATE assessment checklist, Code D of the Police and Criminal Evidence Act 1984 (PACE 1984), and judicial trial management.
1. Scope & Trigger of the Turnbull Guidelines
The Turnbull guidelines apply whenever the prosecution case depends wholly or substantially on visual identification evidence that the defence alleges is mistaken .
When Turnbull Does and Does Not Apply:
Applies : Visual identification of a stranger or acquaintance by an eyewitness; recognition evidence (where the witness claims to know the suspect); voice identification; and identification from CCTV footage.
Does Not Apply : Cases where the defendant admits being present at the scene but denies committing the offence (e.g. self-defence or lack of mens rea ); or where the sole issue is witness credibility (i.e. allegation that the witness is lying, rather than mistaken).
2. Assessing Identification Quality: The ADVOKATE Checklist
When evaluating whether visual identification evidence is of good or poor quality, practitioners and trial judges must systematically evaluate the circumstances of the original observation using the ADVOKATE mnemonic:
Letter ADVOKATE Element Critical Evidentiary Assessment
A Amount of Time How long did the witness have the suspect under observation? (A fleeting glance of 1–2 seconds vs sustained observation over several minutes).
D Distance What was the distance between the witness and the suspect during the observation?
V Visibility What were the lighting and weather conditions? (Daylight/bright streetlamp vs pitch darkness/fog).
O Obstructions Was the view obstructed by passing traffic, trees, crowds, or physical barriers? Was the suspect wearing a disguise, hood, or mask?
K Known or Seen Before Had the witness ever seen or known the suspect before? (Recognition of a familiar person carries greater weight than identification of a complete stranger).
A Any Reason to Remember Was there a special reason for the witness to remember the suspect or event? (e.g., unusual facial tattoo, traumatic confrontation, striking clothing).
T Time Elapsed How much time elapsed between the original observation and the first identification / police description?
E Errors or Discrepancies Are there material discrepancies between the initial description given by the witness to police and the defendant's actual appearance?
3. Classification of Identification Evidence & The Galbraith Test
Under Turnbull , the trial judge must categorize the prosecution identification evidence at the close of the prosecution case as either strong or weak : [ Visual Identification Evidence ]
- |
- +----------------------+----------------------+
- | |
- [ Strong ID Evidence ] [ Weak ID Evidence ]
- | +----------------------+------------------+
- | | |
- v v v
- [ Leave to Jury ] [ Unsupported Weak ID ] [ Supported Weak ID ]
- (Standard Turnbull) | |
- v v
- [ WITHDRAW CASE (Galbraith) ] [ Leave to Jury ]
- (Direct Acquittal / s.125) (Highlight Weaknesses &
- Supporting Evidence)
A. Strong Identification Evidence:
Definition : Good quality observation under ADVOKATE criteria (e.g. sustained view in daylight at close range, or clear recognition of a close family member or neighbor).
Judicial Action : The judge leaves the case to the jury, accompanied by the standard Turnbull warning on caution.
B. Weak Identification Evidence:
Definition : Poor quality observation under ADVOKATE criteria (e.g. fleeting glance at night across a street, heavy obstruction, or significant description discrepancies).
Judicial Action Depends on Supporting Evidence :
Unsupported Weak ID : If the weak identification evidence is unsupported by any independent evidence , the judge must withdraw the case from the jury at the close of the prosecution case and direct an acquittal under the second limb of R v Galbraith [1981] 1 WLR 1039 (no reasonable jury properly directed could convict).
Supported Weak ID : If the weak identification evidence is supported by independent corroborative evidence (e.g. matching DNA, fingerprints, CCTV, bad character admitted under s.101, possession of stolen goods, or confession), the judge leaves the case to the jury , directing them to the weaknesses and pointing out the supporting evidence.
4. Code D PACE 1984: Statutory Identification Procedures
Police procedures for obtaining identification evidence are strictly regulated by Code D of PACE 1984 . Code D sets out a clear hierarchy of formal identification procedures:
VIPER (Video Identification Procedure Electronic Recording) : The primary, mandatory method of formal identification (Code D para 3.3). A moving video recording showing the suspect alongside 8 or more images of other persons resembling the suspect in age, general appearance, and background.
Identification Parade : Used only where VIPER is impracticable.
Group Identification : Suspect observed in an informal group setting (e.g. shopping center).
Confrontation : Direct confrontation between witness and suspect, used only as a last resort where no other method is possible.
Breaches of Code D & Exclusion under Section 78 PACE:
Where police breach Code D (e.g., by showing a single photograph of the suspect to a witness prior to a formal VIPER parade, or failing to hold an identification procedure when required), the defence may apply to exclude the identification evidence under Section 78 PACE 1984 ( R v Forbes [2001] 1 AC 473). If the breach undermines the fairness of the identification process, the evidence will be excluded.
5. Mandatory Turnbull Jury Directions
When leaving visual identification evidence to the jury, the trial judge must deliver a strict, structured Turnbull direction in summing up:
Warning on Special Need for Caution : Explicitly warn the jury of the special need for caution before convicting on visual identification evidence.
Explanation of Rationale : Explain the reason for caution—namely, that an honest witness can be a mistaken witness , that mistaken witnesses can be entirely convincing, and that multiple mistaken witnesses can all be wrong.
Direct Attention to ADVOKATE Factors : Direct the jury to examine the precise circumstances of the observation (distance, lighting, time, obstructions).
Highlight Specific Weaknesses & Supporting Evidence : Point out specific weaknesses in the identification evidence and draw attention to any independent evidence that supports or undermines the identification.