This argument is weak. Alcohol and tobacco are legal despite being far more harmful than cannabis (alcohol causes 20,000 deaths per year in the UK; tobacco causes 78,000). Legalisation does not mean endorsement—it means regulation and control rather than leaving the market to criminals.
Critics argue that a legal market would not eliminate the illegal market, as seen in California, where illegal sales still account for around 50% of the market due to high taxes and regulatory barriers.
This is a valid concern, but it depends on how legalisation is implemented. In Canada, the illegal market has shrunk to around 20-30% of total sales, and continues to decline as legal prices fall and availability increases. The key is to keep taxes low enough that legal cannabis can compete with illegal prices, and to make legal access convenient through retail stores and online sales.
The UK is increasingly isolated in its opposition to cannabis legalisation. Countries and jurisdictions that have legalised include:
Canada legalised recreational cannabis in October 2018, becoming the first G7 country to do so. The results:
Germany legalised cannabis in April 2024, allowing adults to possess up to 25 grams and grow up to three plants at home. Cannabis social clubs (non-profit cooperatives) can grow and distribute to members. Commercial sales are planned for 2025.
It is too early to assess the impact, but the move has increased pressure on other European countries, including the UK, to reconsider their policies.
24 US states have legalised recreational cannabis, covering over 50% of the US population. The results vary by state, but overall:
The Netherlands has tolerated small-scale cannabis sales in licensed "coffeeshops" since 1976, though production remains illegal. The result is a grey market that has worked reasonably well for decades, with:
However, the Dutch model is inconsistent (sales are legal, production is not) and has led to problems with organised crime controlling production. The Netherlands is now experimenting with legal production in a pilot programme.
Portugal decriminalised drug possession for personal use in 2001, treating it as a public health issue rather than a criminal matter. Cannabis remains illegal to sell, but possession of up to 25 grams is not a criminal offence.
The results have been overwhelmingly positive:
Portugal's model shows that decriminalisation (even without legalisation) can reduce harm and improve public health.
Despite growing public support and international evidence, legalisation faces significant political obstacles in the UK:
Both the Conservative and Labour parties officially oppose legalisation. The Labour government elected in 2024 has ruled it out, with Home Secretary Yvette Cooper stating: "We will not legalise cannabis. It is harmful, particularly to young people."
This position is driven by:
The Royal College of Psychiatrists and some police chiefs oppose legalisation, citing concerns about harm to young people and increased use.
However, this opposition is not unanimous. The Royal College of Physicians has called for an evidence-based review of cannabis policy, and several police chiefs have said that cannabis should be deprioritised in favour of tackling serious crime.
There is no consensus on how to legalise. Should the UK follow the Canadian model (commercial sales), the Dutch model (toleration), or the Portuguese model (decriminalisation)? Should cannabis be sold in dedicated stores, pharmacies, or licensed premises? What tax rate should apply?
These questions are complex and require careful policy design. The lack of a clear, agreed model makes it easier for politicians to avoid the issue.
Despite the obstacles, momentum for reform is building:
The most likely path to legalisation is:
Alternatively, the UK could follow the Portuguese model of decriminalisation without legalisation, treating possession as a public health issue rather than a criminal matter. This would be easier to implement politically and would address many of the harms of prohibition (criminalisation, racial disparities) without requiring a legal market.
Support for cannabis legalisation in the UK has reached 53%, with cross-party MPs, police chiefs, and medical professionals calling for evidence-based reform. Canada, Germany, and 24 US states have legalised recreational cannabis, generating billions in tax revenue and reducing criminal justice costs, with no significant increase in youth use. The UK cannabis market is worth £2.6 billion annually, entirely controlled by criminal gangs. Medical cannabis has been legal since 2018, but access remains severely restricted.
The case for legalisation is strong: it would reduce crime, generate tax revenue, improve public health through quality control and age restrictions, expand medical access, and address racial disparities in drug enforcement. The case against—that cannabis is harmful and legalisation would increase use—is not supported by international evidence, which shows that well-regulated legal markets can minimise harm.
The question is no longer if the UK will legalise cannabis, but when and how. The government remains opposed, but public opinion, international evidence, and economic pressures are building momentum for reform. The most likely path is a pilot programme followed by gradual rollout, or decriminalisation as an interim step. Either way, the era of cannabis prohibition in the UK is drawing to a close.