Being found in possession of a controlled drug does not automatically mean that a person intended to supply it. In a prosecution for possession with intent to supply, commonly known as PWITS, the question of intention is a crucial part of the case.

Under section 5(3) of the Misuse of Drugs Act 1971, the offence concerns possession of a controlled drug with an intention to supply it to another person. Importantly, the alleged supply does not need to have taken place. The prosecution may seek to establish that the drugs were being held for future supply.

This creates an obvious evidential question: how can the police establish what somebody intended to do with drugs found in their possession?

There is rarely a single piece of evidence that answers that question. Instead, investigators may examine the quantity and packaging of the drugs, other items found during searches, communications, documents, financial evidence, witness accounts and the circumstances surrounding the arrest.

Understanding how this evidence is used can be important for anyone facing an allegation of possession with intent to supply.

What Must Be Proved in a PWITS Case?

A possession with intent to supply allegation generally involves two central elements.

First, the prosecution must establish possession of a controlled drug.

Second, it must establish that the defendant intended to supply that drug to another person.

The second element distinguishes PWITS from simple possession.

Intent is concerned with what a person intended to do. Because nobody can directly observe another person’s state of mind, the prosecution will often seek to establish intent by drawing inferences from surrounding facts.

According to Crown Prosecution Service guidance, intention to supply may be proved through direct evidence or inferred from the circumstances.

Direct Evidence of Intent to Supply

Sometimes investigators obtain evidence that directly addresses the alleged intention.

Examples can include an admission by a suspect, relevant witness testimony or surveillance evidence.

The strength of direct evidence will depend on its particular circumstances. An alleged admission, for example, may need to be considered in the context of the interview in which it was made. Witness evidence can also be challenged as to its reliability, accuracy and interpretation.

In many PWITS cases, however, there is no straightforward admission or observation of an intended supply.

Investigators may therefore rely heavily on circumstantial evidence.

Proving Intent Through Circumstantial Evidence

Circumstantial evidence involves facts from which another fact may reasonably be inferred.

Imagine that police discover controlled drugs in someone’s possession. That establishes an important part of the investigation, but it does not by itself necessarily explain what the person intended to do with them.

Investigators may therefore examine the wider circumstances.

The CPS identifies several factors that can potentially support an inference of intent to supply, including the quantity of drugs, their purity, the possession of different drugs, packaging and preparation, drug-related equipment and records associated with alleged dealing.

Usually, the significance comes from the overall evidential picture rather than one item viewed in isolation.

Quantity of Drugs

The amount of controlled drugs recovered is often one of the first factors considered.

The prosecution may argue that a quantity is inconsistent with personal consumption and therefore supports an inference that some or all of it was intended for other people.

There is, however, an important distinction between evidence being relevant and evidence being conclusive.

Possessing a particular quantity does not create a universal rule that automatically proves supply. The significance of the amount depends on the substance involved and the surrounding circumstances.

Expert evidence may sometimes become relevant where there is a dispute about whether the amount is consistent with personal use.

The defence may also seek to provide an alternative explanation for the quantity.

Ultimately, the prosecution must establish the alleged intention on the evidence in the individual case.

Packaging and Preparation

How drugs are packaged can be particularly significant.

A single quantity stored together may potentially be interpreted differently from drugs divided into numerous small portions.

CPS guidance recognises drugs prepared into small individually wrapped portions as evidence from which an intention to supply may be inferred.

The prosecution may argue that this type of preparation is consistent with onward distribution.

However, packaging must still be considered alongside the other evidence. The existence of bags or wrapping material does not automatically prove who prepared the drugs, why they were prepared in that way or what a particular defendant intended.

Those questions can become especially important where several people had access to the location in which the items were found.

Drug Purity

Investigators may also consider the purity or condition of the drugs.

CPS guidance identifies possession of uncut drugs or drugs of unusually high purity as a factor that can potentially indicate proximity to a manufacturer or importer.

Laboratory analysis may therefore have significance beyond simply establishing what substance has been recovered.

The prosecution may seek to place the forensic findings within the broader circumstances of the alleged supply operation.

As with other categories of evidence, however, the significance of purity depends on the facts of the individual case.

Possession of Different Types of Drugs

Possession of several different controlled substances may also attract attention.

The prosecution may argue that possession of a variety of drugs is more consistent with distribution than with personal consumption.

That does not mean that possessing more than one type of controlled drug automatically establishes PWITS.

The question remains whether the available evidence supports the allegation that the defendant intended to supply the drugs to somebody else.

Scales and Other Equipment

Objects discovered during a search can become an important part of a drug investigation.

CPS guidance identifies drug-related equipment such as weighing scales, cutting agents, bags and foil wraps as examples of evidence potentially relevant to intent to supply, provided that their presence cannot simply be explained by normal domestic use.

Investigators may therefore look not only at the drugs themselves but at how the surrounding objects relate to them.

Forensic examination may sometimes be relevant. For example, the prosecution may seek to establish whether particular objects have a meaningful connection to the substances recovered.

The defence, meanwhile, may dispute the alleged significance, ownership or use of those items.

Mobile Phones and Communications

Digital evidence can form a major part of modern criminal investigations.

Where investigators lawfully obtain relevant data, communications may be examined to determine whether they support an allegation of drug supply.

The prosecution may seek to rely upon communications that it argues demonstrate arrangements, contacts or other activity relevant to the alleged offence.

However, interpreting a message is not always straightforward.

Questions can arise over:

• Who was actually using the device;
• Who sent or received particular communications;
• Whether a phone was shared;
• The meaning of particular words or phrases;
• The context of the conversation; and
• Whether the communications actually relate to the drugs forming the subject of the charge.

Digital evidence may therefore be highly important while still being open to challenge.

Diaries, Notes and Other Records

Police may seize written records during a search if they believe those records are connected with drug supply.

CPS guidance specifically refers to diaries or documents containing information tending to confirm drug dealing, including records containing customer telephone numbers together with quantities or descriptions of drugs.

The prosecution may argue that such records demonstrate organisation or preparation for future supply.

The interpretation of those documents can nevertheless be disputed.

A list of names, telephone numbers or figures does not necessarily explain itself. Investigators may need to establish how the document relates to the defendant, the drugs and the alleged activity.

What Role Does Cash Play?

Cash is frequently associated in the public mind with drug dealing, but its legal significance requires more care.

Finding cash alongside drugs may lead police to investigate where the money came from and whether it is connected with criminal activity.

However, CPS guidance makes an important distinction: money may potentially provide evidence of previous supply, but money on its own is not evidence of a future intention to supply.

This matters because PWITS is concerned with an intention to make a future supply.

Large amounts of money may nevertheless be admissible where they have genuine evidential significance to an issue in the case. Investigators may therefore examine the amount, source and surrounding financial circumstances.

A legitimate explanation for cash may be relevant when challenging the prosecution’s interpretation.

Surveillance and Witness Evidence

Police investigations may also involve surveillance or witness testimony.

Surveillance evidence can potentially provide direct evidence relevant to an allegation of supply or help place other evidence into context.

Witnesses may also give evidence about what they observed.

As with any criminal case, the reliability of such evidence can be tested. Relevant questions may include whether a witness had a clear opportunity to observe what happened, whether identification is disputed and whether the witness’s interpretation of events is supported by other evidence.

Forensic Evidence

Forensic analysis can play several roles in a drug investigation.

Laboratory testing can establish the identity of a suspected controlled substance and may provide information concerning quantity or purity.

Other forensic evidence may potentially be relevant to determining connections between people and objects, depending on the circumstances.

However, forensic evidence showing that a person handled an object is not necessarily the same thing as proving what that person intended to do.

The prosecution still has to establish the elements of the particular offence charged.

Location and Circumstances

Where drugs are discovered can also matter.

Drugs found in a defendant’s clothing or personal belongings may raise different evidential issues from drugs found in a shared house, communal area or vehicle used by several people.

Where several individuals have access to a location, investigators may need to determine who knew about the drugs and who exercised control over them.

This can be particularly significant because possession must first be established before the prosecution can prove possession with intent to supply.

Simply being present near controlled drugs does not automatically establish all the elements of PWITS.

Does the Police Need Evidence of an Actual Sale?

No.

This is one of the most important features of PWITS.

Possession with intent to supply is concerned with an intention to make a future supply. Police therefore do not necessarily need to witness a completed transaction before an allegation can be investigated or charged.

The CPS expressly distinguishes future intention from evidence of past supply. Where evidence demonstrates a completed previous supply, a substantive supply offence may be more appropriate.

PWITS therefore allows the prosecution to rely on evidence indicating that controlled drugs in a person’s possession were intended for future distribution.

Does Supply Have to Involve Money?

No.

Under the Misuse of Drugs Act 1971, supply is not limited to commercial dealing.

CPS guidance states that supplying includes distributing and does not require proof of payment or reward.

Consequently, an intention to give controlled drugs to somebody else can potentially raise supply issues even where no money was expected in return.

This is another reason why the prosecution’s case cannot necessarily be answered simply by saying that the defendant was not selling drugs for profit.

The particular circumstances must be examined.

Is One Piece of Evidence Enough?

Theoretically, the strength of any prosecution depends on the quality and circumstances of the available evidence.

In practice, CPS guidance notes that intent may often be inferred from a combination of factors.

For example, prosecutors may seek to build a case around the quantity and packaging of controlled drugs together with other relevant evidence.

Each individual item may then be presented as part of a broader picture.

The defence can challenge that picture by examining the individual evidence, the conclusions drawn from it and whether alternative explanations exist.

Can Police Get It Wrong?

Evidence requires interpretation.

An object or circumstance that investigators regard as suspicious may have another explanation. A communication can be misunderstood. An item may belong to somebody else. A shared location can create disputes about possession and control.

This is why criminal cases are determined through evidence and legal process rather than simply on an officer’s initial suspicion.

A person may be arrested where police have the necessary grounds for doing so, but an arrest is not the same as a conviction.

The prosecution must ultimately prove the criminal allegation to the required legal standard.

What Happens During a Police Interview?

A police interview can become a significant source of evidence.

Questions may focus on matters such as:

• Who owned or controlled the drugs;
• Why the drugs were present;
• Why particular objects were found nearby;
• Who owned or used a relevant mobile phone;
• The meaning of communications or documents;
• The source of money; and
• The suspect’s relationship with other people involved in the investigation.

What is said during interview can affect how the case develops.

A person interviewed under caution is entitled to legal advice, and obtaining advice before answering questions can be particularly important in serious drug investigations.

How Can Intent-to-Supply Evidence Be Challenged?

There is no single defence strategy applicable to every PWITS case.

A criminal defence solicitor will generally need to analyse the prosecution evidence individually and collectively.

Depending on the case, relevant issues might include whether possession has actually been established, whether the defendant knew about the drugs, whether the alleged quantity is inconsistent with personal use, whether objects relied upon by the prosecution genuinely indicate supply and whether digital evidence has been correctly attributed or interpreted.

The defence may also examine whether apparently suspicious circumstances have credible alternative explanations.

The central question remains whether the prosecution can prove the alleged intention to supply.

Why the Alleged Role Matters

If a person is convicted, the nature of their involvement becomes particularly important at sentencing.

The Sentencing Council guideline assesses drug supply and PWITS offences by considering factors including the offender’s role and the harm involved.

The guideline distinguishes between leading, significant and lesser roles.

This means that somebody alleged to have organised or directed supply may be treated differently from somebody whose involvement was substantially more limited.

Quantity is also central to the assessment of harm, with guideline categories applying to different controlled drugs and circumstances.

The evidence gathered during the investigation can therefore affect not only whether an offence is proved but also how the defendant’s involvement is characterised if there is a conviction.

Conclusion

Police can seek to prove intent to supply drugs through direct evidence or through inferences drawn from the circumstances surrounding possession.

The quantity and preparation of drugs, their purity, the presence of different substances, relevant equipment, documents, financial evidence, communications, surveillance and witness evidence may all become part of an investigation.

However, no piece of evidence should automatically be viewed in isolation. A prosecution for possession with intent to supply must establish both possession of the controlled drug and the required intention to supply it to another person.

The distinction is important because evidence that raises suspicion does not necessarily prove what a person intended.

Anyone accused of possession with intent to supply should obtain specialist criminal defence advice as early as possible. A solicitor can review the prosecution evidence, identify areas that may be challenged, advise during police interview and provide representation if criminal proceedings follow.