What the Prosecution Must Prove
The prosecution must prove that the defendant entered into an agreement with at least one other person, that the agreement was to supply, produce, or import a controlled drug, and that the defendant intended the agreement would be carried out. The prosecution does not need to prove that any supply actually took place. In practice, the prosecution rarely has direct evidence of an explicit agreement — instead, it asks the jury to draw inferences from circumstantial evidence including patterns of phone contact, movement data, possession of cash or drugs, association with others involved, and any relevant messaging evidence.
Roles Within a Drugs Conspiracy
The Sentencing Council recognises three broad role categories: leading, significant, and lesser. A leading role typically involves directing or organising the operation, exercising control over others, or having a management function. A significant role covers those who performed an important function — regular couriers, those who stored drugs, or those who recruited others. A lesser role includes those who were peripheral, acted under direction, were exploited or coerced, or had limited awareness of the wider conspiracy. The role assessment is one of the principal factors in determining sentence and can make a very significant difference to the outcome.
| Role | Class A — starting point (street dealing) | Class A — higher end |
|---|---|---|
| Leading | 8 years 6 months | Up to life |
| Significant | 4 years 6 months | Up to 16 years |
| Lesser | 3 years | Up to 7 years |
Encrypted Messaging Evidence
A significant number of drugs conspiracy prosecutions have been brought on the basis of evidence recovered from encrypted communication platforms. Evidence derived from such sources has generated substantial legal argument about admissibility and the attribution of specific messages to a particular individual. Specialist advice on the challenges available to this type of evidence is important where it forms part of the prosecution case.
Entering and Leaving a Conspiracy
A person can enter a conspiracy at any point during its existence and can leave it at any point. Even if a conspiracy is alleged to have run for many months, a defendant's involvement may have been for a much shorter period. The prosecution must prove that the defendant was party to the agreement during the period of their alleged involvement, not for the full duration of the conspiracy. Where a defendant's involvement was limited in time or scope, this is relevant both to the strength of the prosecution case and to the role and harm assessment at sentencing.
What to Do if You Are Arrested or Under Investigation
If you are arrested or under investigation in connection with a drugs conspiracy, do not answer police questions without a solicitor present. You have an absolute right to free, independent legal advice at the police station. Drugs conspiracy investigations are typically conducted over long periods before arrests are made, and the police will often have gathered significant evidence by the time of interview. Following charge, the case will be sent to the Crown Court — early and thorough preparation is essential.