What is conspiracy?
Conspiracy is governed by the Criminal Law Act 1977. The core offence (s.1) is an agreement between two or more people to carry out conduct that necessarily amounts to a criminal offence. It is not necessary that the offence is actually committed — the agreement itself is the crime. The prosecution must prove an agreement, an intention that the offence be carried out, and knowledge of the circumstances that make the agreed course of conduct criminal.
Because the agreement is the offence, conspiracy is unusual: a person can be convicted where nothing ever happened, on the strength of what was said, written, or inferred from association. This makes the evidential basis of every conspiracy case critical, and it makes the distinction between knowledge, association, and active participation central to the defence.
There is also common-law conspiracy to defraud, preserved by section 2 of the Criminal Law Act 1977, which captures agreements to deceive that may not amount to a substantive offence. The reach of these charges is wide, and they are frequently used in financial and drugs cases involving multiple defendants.
Why conspiracy cases are different
- You can be convicted even if the planned offence never occurred
- Joint enterprise and 'parasitic' liability principles often apply
- Evidence frequently relies on inference from phone records, association, and presence
- Co-defendants may provide prosecution evidence underwritten by sentence reductions
- Cases are often voluminous, running to tens of thousands of pages of evidence
How we defend conspiracy charges
- Forensic review of phone, banking, and surveillance material
- Identifying and challenging inference-based allegations of agreement
- Separating your role from co-defendants where no agreement is proven
- Applications to sever multi-handed indictments where appropriate
- Cross-examining co-defendants and expert cell-site evidence
Common conspiracy charges
- Conspiracy to supply controlled drugs
- Conspiracy to defraud
- Conspiracy to steal / robbery / burglary
- Conspiracy to commit money laundering
- Conspiracy to pervert the course of justice
Knowledge is not the same as joining a conspiracy
A frequent feature of conspiracy cases is that a defendant knew about, or was associated with, people involved in offending — but did not agree to take part. Mere knowledge of a conspiracy, or association with conspirators, is not the same as being a party to the agreement. The prosecution must prove that you intentionally joined the agreement, not merely that you were aware of it or present when it was discussed.
We focus forensic attention on this distinction. Phone schedules, contact patterns, and surveillance are examined to test whether the prosecution can truly prove an agreement, or whether the evidence goes no further than association. Where the case depends on inference, we identify the missing logical steps and expose them to the jury.
Volume, disclosure and case management
Conspiracy cases are often vast, with tens of thousands of pages of evidence and months of unused material. Effective defence depends on rigorous case management — proper disclosure requests, identification of the real issues, and early consideration of severance or separate representation.
We manage large cases methodically, using digital review where appropriate, and ensure that the volume of material does not obscure the weaknesses in the prosecution case. In multi-handed trials, the relationship between defendants is itself often the key to the outcome.
Sentencing in conspiracy cases
Sentences in conspiracy reflect the intended substantive offence and the defendant’s role. Conspiracy to supply Class A drugs can attract 10–16 years or more for significant roles; conspiracy to defraud can attract lengthy sentences measured against the intended loss. The Sentencing Council guidelines assess culpability by role — leading, significant, or lesser — and by the scale of the intended offending.
Establishing a lesser role, limited involvement, or early withdrawal from the agreement can materially reduce the sentence. We present the evidence that supports the correct role categorisation from the first conference through to the sentencing hearing.
Frequently asked questions
Yes. The offence is the agreement itself. If the prosecution proves you agreed with at least one other person to commit a criminal offence, and intended it to be carried out, you can be convicted even if the offence was never completed.
No. Mere knowledge of a conspiracy, or association with conspirators, is not the same as being a party to the agreement. The prosecution must prove you intentionally joined the agreement. We focus on the distinction between knowledge and participation.
Very. Sentences reflect the intended offence and your role. Conspiracy to supply Class A drugs can attract sentences of 10–16 years or more for significant roles. The Sentencing Council guidelines assess culpability by your role (leading, significant, or lesser) and the scale of the intended offending.
Conspiracy to defraud can attract lengthy sentences measured against the intended loss. The court assesses your role and the scale of the intended offending; significant or leading roles involving substantial sums can result in years of imprisonment. Establishing a lesser role or limited involvement can materially reduce the sentence.
Agreement is rarely admitted and is usually inferred from circumstantial evidence — phone records, contact patterns, surveillance, and co-defendant testimony. We test whether those inferences are justified and whether the evidence goes further than association. Where the case depends on inference, we identify the missing logical steps and expose them to the jury.
Yes. Co-defendants may provide prosecution evidence, sometimes in exchange for sentence reductions. Such evidence must be scrutinised carefully for motive and reliability. We cross-examine co-defendants and highlight any incentive to minimise their own role by exaggerating yours.