A conspiracy charge is one of the broadest and most commonly used charges in serious criminal cases in England and Wales. It can be used to prosecute people who planned a crime — even if the crime itself was never actually committed. It can result in the same penalty as the completed offence. And it can be applied to a person who played only a minor planning role. Understanding exactly what the prosecution must prove, and where the legal boundaries lie, is essential for anyone facing a conspiracy allegation.
Our criminal defence solicitors in Bolton regularly represent clients charged with conspiracy at the Crown Court and can advise on the specific elements of your case from the outset.
What Is Conspiracy?
Conspiracy is defined by section 1 of the Criminal Law Act 1977. A person is guilty of conspiracy if they agree with one or more other persons that a course of conduct shall be pursued which, if carried out as intended, would necessarily amount to or involve the commission of a criminal offence.
Three key elements must be present:
1. An agreement — there must be a genuine agreement between two or more people. A one-sided intention is not enough — both parties must actually agree. The agreement does not need to be formal or explicit — it can be implied from the circumstances.
2. The agreement must be to pursue a course of conduct — the prosecution must show that the parties agreed on a specific criminal purpose, not merely that they associated together or knew about criminal activity.
3. The course of conduct would necessarily involve a criminal offence — the agreed plan must have an unlawful element that would be committed if it were carried out as intended.
Does the Offence Have to Actually Be Committed?
No — and this is one of the most important aspects of conspiracy law. The offence of conspiracy is committed the moment the agreement is made, regardless of whether the planned crime is ever carried out, attempted, or even progressed beyond the planning stage.
This means a person can be convicted of conspiracy to supply drugs, conspiracy to commit robbery, or conspiracy to defraud even where no drugs were ever supplied, no robbery took place, and no money was taken. The agreement itself is the offence.
What Types of Conspiracy Are There?
The Criminal Law Act 1977 creates what is known as statutory conspiracy — the most common form. Alongside statutory conspiracy, there are two forms of common law conspiracy that continue to exist:
Conspiracy to defraud — an agreement to deprive another person dishonestly of something to which they are legally entitled, or to injure some proprietary right of another. This charge is frequently used in fraud and financial crime cases where the specific statutory fraud offences do not perfectly fit the conduct alleged.
Conspiracy to corrupt public morals or outrage public decency — these are rare charges used in exceptional circumstances.
What Must the Prosecution Prove?
To secure a conviction for conspiracy, the prosecution must prove beyond reasonable doubt that:
The defendant agreed with at least one other person — a single co-conspirator is sufficient. The defendant cannot be convicted of conspiracy on their own. Crucially, the other party to the agreement does not need to be identified or charged — only that someone agreed.
The defendant intended the agreement to be carried out — mere knowledge that others are planning a crime is not sufficient. The defendant must have intended that the agreement would be implemented.
The defendant knew the relevant facts — the defendant must have known enough about the criminal purpose of the agreement to be said to have agreed to it. This does not require full knowledge of every detail — general knowledge of the criminal nature of the plan is sufficient.
The agreed conduct would necessarily involve a criminal offence — the prosecution must show that the plan, if carried out as the parties intended, would necessarily result in a criminal offence.
How Do You Know If You Are Under Investigation?
Unlike some other offences, conspiracy investigations are often lengthy before any arrest is made. The police and investigating agencies — which may include the NCA, HMRC, or local organised crime units — will typically gather extensive evidence before making arrests. This can include:
- Telephone intercept material (not admissible in evidence but used to direct investigations)
- Call data records showing communication between co-conspirators
- Surveillance — both physical surveillance and CCTV
- Financial analysis and banking records
- Cell site evidence showing the movements of mobile phones
- Covert human intelligence sources (informants)
If you become aware that you may be under investigation for conspiracy — through contact from police, through a search of your home or business, or through being aware that associates have been arrested — seek legal advice immediately. Do not attempt to contact co-defendants or destroy any materials.
Our police station representation team is available around the clock and can advise you before you are formally arrested or interviewed.
What Are the Penalties?
The penalty for conspiracy is determined by the maximum sentence for the substantive offence that was the object of the conspiracy. This means:
| Conspiracy to commit | Maximum sentence |
|---|---|
| Murder | Life imprisonment |
| Supply Class A drugs | Life imprisonment |
| Robbery | Life imprisonment |
| Fraud | 10 years |
| Burglary | 14 years |
| GBH (section 18) | Life imprisonment |
Where the substantive offence carries life imprisonment, so does the conspiracy. Where it carries a fixed-term maximum, the conspiracy carries the same maximum. In practice, the sentences imposed for conspiracy are often equivalent to those for the completed offence, particularly where the plan was well advanced or partly executed.
Common Defences to a Conspiracy Charge
Withdrawal — where a defendant can show that they genuinely withdrew from the conspiracy before the offence was committed — and took steps to undo their involvement — this may be a complete or partial defence. Simply stopping participating is not enough; active withdrawal is required.
No agreement — challenging the prosecution’s evidence that an agreement was actually reached. Mere association with co-conspirators or knowledge of their plans is not enough.
No intent — arguing that the defendant did not intend the agreement to be carried out, or did not know enough about its criminal purpose to form the requisite intent.
Duress — in limited circumstances where a defendant was coerced into the conspiracy under genuine threat of serious harm, a duress defence may be available. This is a high bar.
How Hi Solicitors Can Help
Conspiracy cases are complex, evidence-heavy, and frequently involve multiple defendants and extensive pre-trial proceedings. Our conspiracy offences solicitors will analyse the prosecution’s evidence carefully, identify any weaknesses in the case against you, and build the strongest possible defence. Where the case forms part of a broader organised crime investigation, our team has the experience to handle the full complexity of multi-defendant proceedings.
Call 01204 371 414 for a free initial consultation with our solicitors in Bolton. All enquiries are treated in the strictest confidence.
187b Derby St, Bolton, BL3 6JT · hisolicitors.co.uk
Frequently Asked Questions
Q: Can you be convicted of conspiracy if the crime was never committed?
Yes. Conspiracy is committed the moment the agreement is made — regardless of whether the planned offence was ever carried out, attempted, or progressed. The agreement itself is the criminal act.
Q: Do all co-conspirators have to be charged?
No. A person can be convicted of conspiracy even where no other co-conspirators are identified, charged, or convicted — provided the prosecution can show that at least one other person was party to the agreement. The identity of the other party does not need to be known.
Q: What is the difference between conspiracy and attempt?
Attempt requires a person to have done an act that is more than merely preparatory to committing the offence. Conspiracy requires only the agreement — no act beyond the agreement itself is needed. It is therefore possible to be charged with conspiracy where the planning stage has not progressed to any overt act.
Q: Can I be charged with conspiracy if I only played a minor role?
Yes. A person who agreed to participate in a criminal plan — even in a minor capacity — can be convicted of conspiracy. The penalty imposed will reflect their role and culpability within the overall scheme, but the charge itself applies to all parties to the agreement.
Q: What is conspiracy to defraud?
Conspiracy to defraud is a common law offence — separate from the statutory conspiracy offences under the Criminal Law Act 1977 — covering agreements to dishonestly deprive another of something to which they are legally entitled. It is frequently used in fraud cases and carries an unlimited sentence.
