Jolly v DPP

Factual and Procedural Background

This appeal arises from a decision of the Stipendiary Magistrate for Cheshire, sitting in the Youth Court at Warrington, concerning an allegation that the Appellant drove a motor vehicle on 27th October 1998 with a blood alcohol level exceeding the legal limit, contrary to Section 5(1)(a) of The Road Traffic Act 1988 and Schedule 2 to The Road Traffic Offenders Act 1988. The Appellant was stopped after being observed driving, subjected to breath tests which were positive, and subsequently provided a blood sample. The blood sample was analyzed by a forensic scientist using gas chromatography, and the analysis indicated an alcohol concentration exceeding the prescribed limit.

The Appellant’s solicitor challenged the admissibility of the computer-generated analysis results, arguing that there was no evidence the computer used was operating properly as required by Section 69 of The Police and Criminal Evidence Act 1984, and contended that it was too late to remedy this defect after the close of the defence case. The Magistrate allowed the prosecution to recall the forensic scientist who then explained the calibration and proper functioning of the machines, satisfying the court that the evidence was reliable. The question on appeal was whether the Magistrate was correct to exercise discretion to admit this evidence after the close of the case.

Legal Issues Presented

1. Whether the Magistrate was correct to exercise discretion to allow the prosecution to call additional evidence after the close of the defence case to satisfy the requirements of Section 69 of The Police and Criminal Evidence Act 1984 concerning the proper operation of a computer used to produce evidential results.
2. Whether it was too late in the proceedings for the prosecution to remedy a gap in their case after the defence had closed.

Arguments of the Parties

Appellant's Arguments

• The court could not rely on the computer-generated analysis results because there was no evidence that the computer was operating properly at all material times as required by Section 69 of The Police and Criminal Evidence Act 1984.
• It was too late to allow the prosecution to recall the forensic scientist or to produce a certificate after the close of the defence case.

Respondent's Arguments

• The expert evidence regarding the method of analysis should suffice to meet the requirements of Section 69.
• If there was a procedural defect, the court had discretion to allow the prosecution to call further evidence to remedy it.

Table of Precedents Cited

Precedent	Rule or Principle Cited For	Application by the Court
R v Sheppard [1993] AC 80	Affirmative evidence of computer reliability is required under Section 69 of The Police and Criminal Evidence Act 1984 for computer-produced documents to be admissible.	Confirmed that the prosecution must produce evidence of computer reliability; the absence of such evidence initially created a gap in the prosecution case.
R v Tate [1977] RTR 17	Trial judge's discretion to allow prosecution to call further evidence after closing their case.	Supported the principle that discretion exists but must be exercised judicially and not perversely; no prejudice to the defendant justified allowing further evidence.
R v Pilcher [1974] 60 Crim.App.R. 1	Limits on the discretion to admit further prosecution evidence after defence case has begun.	Emphasized the need to protect the adversarial structure and avoid unfair surprise to the defence.
Morris v Matthews [1981] JP 233	Discretion to admit omitted prosecution evidence, including substantive matters, exercised judicially.	Confirmed discretion is not limited to formal or technical omissions and must balance fairness and finality.
MacDonald v Skelt [1985] RTR 321	Prosecutor may re-open case to call evidence on substantive issues after case closure.	Held that discretion to re-open case was properly exercised and not perverse or wrong in principle.
Francis [1990] 91 Cr. App.R. 271	General discretion to admit further prosecution evidence after close of case beyond two established exceptions.	Discretion should be flexible but sparingly exercised; earlier applications more likely to be granted.
Munnery [1992] 94 Crim.App.R.164	Discretion to admit further evidence after prosecution case closed, especially when evidence is tendered after defence has begun.	Reinforced the need to balance adversarial structure with justice; discretion must consider potential prejudice and finality.
James v South Glamorgan County Council [1992] RTR 312	Discretion to admit additional evidence after prosecution case closed is exceptional and must avoid unfairness.	Discretion exercised properly where no unfairness to defendant was found.
R v Pydar Justices ex parte Foster [1995] 160 JP 87	Defence counsel's duty to lay ground for submissions by cross-examination or evidence.	Commented on proper conduct of defence to avoid surprise and unfairness.
R v Aylesbury Crown Court ex parte Lait (1998, unreported)	Discretion to re-open prosecution case may be limited by considerations of delay and finality.	Held that granting leave to re-open case and adjourn for re-hearing was outside reasonable bounds of discretion on facts.
Simms v Moore [1972] QB 327	Magistrates have inherent power to regulate procedure in interests of justice and fair trial.	Rule 13 of Magistrates Courts Rules is directory not mandatory; inherent power supports discretion to admit evidence.
Webb v Leadbetter [1966] 1 WLR 245	General rule that magistrates should not admit evidence after retiring or after defence case closed absent special circumstances.	Supported the principle of finality but acknowledged narrow exceptions for discretion.

Court's Reasoning and Analysis

The court acknowledged the statutory requirement under Section 69(1) of The Police and Criminal Evidence Act 1984 that computer-generated evidence must be supported by affirmative evidence of the computer's proper operation to be admissible. The absence of such evidence initially created a gap in the prosecution's case.

The court examined extensive case law establishing that while the prosecution must ordinarily close its case before the defence begins, there exists a judicial discretion to allow the prosecution to call further evidence after closure. This discretion aims to balance the adversarial trial structure with the interests of justice, ensuring defendants answer the full case against them without being unfairly prejudiced by late evidence.

The discretion is to be exercised sparingly and judicially, considering the timing of the application, the nature of the evidence (technical or substantive), the potential prejudice to the defendant, and the importance of finality in litigation. The court reviewed authorities confirming that this discretion is flexible and not confined to narrow exceptions, but should not be exercised lightly.

Applying these principles, the court found that the Magistrate did not err in allowing the prosecution to recall the forensic scientist to provide the necessary evidence about the computer's proper functioning. The evidence addressed a technical lacuna, caused by an oversight, and did not prejudice the Appellant. The timing and manner of the application were reasonable, and justice required that the prosecution be permitted to fill the evidential gap.

Holding and Implications

The appeal is DISMISSED.

The court upheld the Magistrate’s exercise of discretion to admit additional prosecution evidence after the close of the defence case. The decision affirms that courts possess a general discretion to permit late evidence to remedy gaps in the prosecution case, provided the interests of justice and fairness to the defendant are carefully balanced. No new precedent was established beyond the application of existing principles. The direct effect is that the Appellant’s conviction stands, and the prosecution’s evidential case was properly completed.