This guide is maintained as a current resource for July 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Discover what evidence is needed to charge someone with assault offences in England and Wales. This guide explains the legal standards, types of evidence (witness statements, medical and digital evidence), how the CPS assesses cases, and what must be proved for common assault, ABH, and GBH charges.
Assault offences cover a range of criminal conduct in England and Wales, from common assault to the most serious forms of grievous bodily harm (GBH). Before the Crown Prosecution Service (CPS) will charge an individual, the police and prosecutors must be persuaded there is sufficient admissible evidence to provide a realistic prospect of conviction and that it is in the public interest to prosecute. This article explains what types of evidence are typically needed to support assault charges and how that evidence is used in criminal proceedings.
Understanding Assault Offences
Under the law in England and Wales, “assault” is an umbrella term that includes a number of offences against the person, primarily found in the Offences Against the Person Act 1861 and the Criminal Justice Act 1988. The main categories include:
- Common assault and battery – the least serious forms of assault.
- Assault occasioning actual bodily harm (ABH) – where injuries are more than trivial.
- Grievous bodily harm (GBH) – serious injury, sometimes with intent.
- Aggravated or specific assaults – for example, assaults on emergency workers or police officers.
Each category has distinct elements that must be proved.
The Charging Decision: CPS Code and Standards
Before charging someone, the CPS applies the Code for Crown Prosecutors, which has two stages:
- Evidential Stage – prosecutors must be satisfied that there is sufficient evidence to provide a realistic prospect of conviction. This means a reasonable jury or magistrates' court, properly directed in law, would be more likely than not to convict based on the available evidence.
- Public Interest Stage – prosecutors must decide whether it is in the public interest to bring a prosecution. Factors include seriousness of the offence, the impact on the victim, culpability of the suspect, and wider societal considerations.
Where not all evidence is yet obtained, but there are reasonable grounds to believe further evidence will emerge, the CPS may apply a threshold test allowing charges to be brought while the investigation continues.
Core Types of Evidence in Assault Cases
The prosecution's task is to prove each element of the assault offence. Evidence must be relevant (logically tied to proving a fact in issue) and admissible (properly obtained under the law).
1. Witness Testimony
Victim statements are among the most common forms of evidence in assault cases. The victim's account of what happened, when and where it occurred, and how the defendant acted forms a key part of the prosecution's case. A victim's statement is legally treated as evidence once given and can be sufficient on its own to charge someone if it meets the realistic prospect test.
Third‑party eyewitness accounts can corroborate the victim's version. Independent witnesses add weight to the evidence and help establish the sequence of events.
2. Physical Evidence
Photographs of injuries, forensic evidence, and items found at the scene can support witness accounts. In common assault cases, visible injuries such as bruises or redness may be sufficient without formal medical records. For more serious offences like ABH or GBH, medical records, X‑rays, and expert reports are often critical to proving the nature and severity of injuries.
3. Digital and Documentary Evidence
In many cases, digital evidence plays an important role:
- Civilian or police CCTV footage showing the incident.
- Body‑worn camera recordings from attending officers.
- Mobile phone records, text messages, and social media exchanges that can establish intent, context, or presence at the scene.
- 911/999 call recordings and police incident reports that capture early accounts.
These support the narrative from witnesses and help establish the suspect's actions and state of mind.
4. Expert Evidence
In some cases, especially where psychiatric injury is alleged or there is complex medical evidence, expert testimony from doctors or specialists is required to explain the nature of injuries or their impact.
Proving the Legal Elements
Different assault offences have distinct legal elements that must be proved:
- Common assault – the prosecution must show intentional or reckless causing of another person to apprehend immediate unlawful violence. Physical contact is not required.
- Battery – intentional or reckless application of unlawful force.
- ABH (Section 47, OAPA 1861) – the injury must be more than transient or trifling and caused by the defendant's act.
- GBH (Sections 18 and 20, OAPA 1861) – serious injury, and for Section 18, specific intent to cause serious harm must be shown.
Evidence must be presented to a criminal court which proves these elements beyond reasonable doubt at trial. The charging decision requires a lower evidential threshold, but the available evidence must make conviction plausible.
Charging Without Forensic Evidence
There is a common misconception that a suspect cannot be charged without forensic or physical evidence such as DNA or CCTV. In practice, a charge can be brought on the strength of witness statements, even in the absence of physical evidence, provided prosecutors are satisfied the evidence overall meets the realistic prospect test.
For example, if a credible victim account is consistent and other supporting details (timeline, witness reports, phone records) align, the CPS may authorise charges while continuing to gather further evidence.
Practical Steps During an Investigation
Police Investigation
Once a report of assault is made, police officers will:
- Attend and secure the scene.
- Take witness and victim statements.
- Gather physical and digital evidence such as CCTV and photos.
- Interview the suspect under caution where appropriate.
- Prepare evidence for submission to the CPS.
These steps are governed by procedures under the Police and Criminal Evidence Act 1984 and related codes of practice.
Prosecutor Review
The CPS reviews the evidence to assess:
- Whether the evidential threshold is met.
- Whether a prosecution is in the public interest.
They may authorise a charge, direct further investigation, propose alternative charges, or decide not to proceed.
Summary: Key Points
- Sufficient evidence is essential before charging for an assault offence. The CPS must be satisfied that the evidence could lead to a realistic prospect of conviction and that prosecution is in the public interest.
- Various types of evidence contribute to a charging decision, including victim and eyewitness testimony, physical and medical evidence, digital records, and expert reports.
- For serious assault charges, medical evidence and specialist testimony often play a significant role.
- Charges can be brought even without forensic evidence if the overall evidence satisfies the realistic prospect test.
Understanding the evidential requirements for assault offences helps victims, witnesses, and suspects appreciate how decisions are made in the criminal justice system. If you are directly involved in a specific case, consult a qualified solicitor for tailored guidance.
