The United Kingdom

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As far as we can tell, in our series about Marijuana International Regulations, Cannabis in the United Kingdom is illegal for recreational use and is classified as a Class B drug. In 2004, cannabis was made a Class C drug with less severe penalties but it was moved back to Class B in 2009. Medical use of cannabis, when prescribed by a registered specialist doctor, was legalised in November 2018.

Cannabis is widely used as an illegal drug in the UK, while other strains lower in THC have been used industrially for over a thousand years for fibre, oil and seeds. Cannabis has been restricted as a drug in the United Kingdom since 1928, though its usage as a recreational drug was limited until the 1960s, when increasing popularity led to stricter 1971 classification.

Despite the fact that cannabis is illegal in the UK, with limited availability for medical use, the United Kingdom is the world's largest exporter of legal cannabis.

Industrial use

The oldest evidence of cannabis in Britain was from some seeds found in a well in York, seeds found at Micklegate were associated with a 10th-century Viking settlement. Since it appears to have been mostly grown around the coastal areas it suggests the main reason for cultivating it was as a source of vegetable fibre which was stronger and more durable than stinging nettle or flax. This makes it ideal for making into cordage, ropes, fishing nets and canvas.

With hemp ropes being fundamental to the success of the English Navy, King Henry VIII in 1533 mandated that landowners grow allotments of hemp; Elizabeth I later increased those quotas, and the penalties for failing to meet them. As fibre became more available and the growing of hemp became more widespread, people began to find many other uses for the crop. It became a very important part of the British economy. Eventually, demand had expanded to the point that the demand for more fibre was part of the driving force to colonise new lands. Thanks to its hardiness and ease of cultivation, it became an ideal crop to grow in the new British colonies. Moreover, the naval ships built to protect the new colonies and those built to bring the hemp back, also increased demand, as every two years or so much of their two hundred tonnes of ropes and sail cloth had to be renewed.

Use as a drug

Cannabis gained new attention in the Western medical world at the introduction of Irish physician William Brooke O'Shaughnessy, who had studied the drug while working as a medical officer in Bengal with the East India Company, and brought a quantity of cannabis with him on his return to Britain in 1842.

Use of psychoactive cannabis was already prevalent in some of the new territories that Britain added to its empire, including South Asia and Southern Africa. Cannabis as a drug also spread slowly in other parts of the Empire; cannabis was introduced to Jamaica in the 1850s–1860s by indentured servants imported from India during British rule of both nations; many of the terms used in cannabis culture in Jamaica are based on Indian terms, including the term ganja.


Cannabis prohibition began earlier in Britain's colonies than in Britain itself; attempts at criminalising cannabis in British India were made, and mooted, in 1838, 1871, and 1877. In 1894 the British Indian Hemp Drugs Commission judged that "little injury" was caused to society by the use of cannabis. Cannabis was banned in Mauritius in 1840, Singapore in 1870, Jamaica in 1913, East Africa Protectorate in 1914, and in Sierra Leone in 1920.[ In 1922, South Africa banned cannabis, and appealed to the League of Nations to include cannabis among prohibited drugs in its upcoming convention.

In Britain itself, in 1928 in accordance with the 1925 International Opium Convention, the United Kingdom first prohibited cannabis as a drug, adding cannabis as an addendum to the Dangerous Drugs Act 1920.

Cannabis remained a fringe issue in the British public consciousness through the Interwar years and beyond, associated with society's margins: "coloured seamen of the East End and clubs frequented by Negro theatrical performers". This perception was strained by a 1950 police raid on Club Eleven in Soho which recovered cannabis and cocaine, and led to the arrest of several young white British men. With the changing youth and drug cultures globally, cannabis arrests increased dramatically in the UK: "from 235 in 1960 to 4,683 by the end of the decade, principally involving white middle class youths with no previous convictions". By 1973, marijuana possession convictions in the UK had reached 11,111 annually.

With the passage of the Misuse of Drugs Act 1971, cannabis was listed as a Class B drug. It remained Class B, except for the 2004–2009 period where it was classified as Class C, a lower punishment category, before being moved back to B.

Recreational Use

Cannabis is widely used throughout the United Kingdom, by people of all ages and from all socio-economic backgrounds. In 2017, 7.2% of 16 to 59-year-olds reported using cannabis in the last year, making it the most commonly used illegal drug in the United Kingdom. The European drug report 2017 found that 29.4% of those aged 15–64 had used cannabis at least once. This compares with France who has some of the strongest drug laws in Europe with 40.9% and Portugal which views drug taking as a medical issue and therefore has far more relaxed laws at 9.4%

Cannabis is at times linked to young people beginning to smoke tobacco as cannabis is often smoked with tobacco in the United Kingdom, unlike in many other parts of the world. As well as the use of tobacco when smoking cannabis, as a spliff, many people in Britain use a "roach card" (card or similar material rolled into a cylinder to serve as a rudimentary filter / structural support). As the option of vaporisation becomes more readily available, and as the market for hashish is replaced by herbal cannabis grown in the UK which can be smoked pure in a joint, this association of mixing cannabis with tobacco is becoming weaker. The higher relative price of cannabis compared to the rest of the world remains the most likely explanation for the mixing of cannabis with tobacco, (although many users do this purely to ensure the "joint" smokes correctly, and to prevent it from going out).

Industrial cannabis

Since 1993, the Home Office has been granting licences for the purposes of cultivating and processing cannabis. The UK government now provides free business advice and support services for growers and processors of cannabis for fibre. They can also issue licences for importing fibre in the form of hemp from abroad. The Department for Environment, Food and Rural Affairs (DEFRA) provides help and advice with obtaining financial assistance via the Single Payment Scheme. In England further funding may be available from Rural Development Programme for England.

Animal feed

Mice, rats and fowl are all known to like cannabis seed and it is a favoured food amongst some British pigeon fanciers. The linnet's fondness of the cannabis seed has earned it the Latin species name of cannabina. By and large, cannabis seed is too expensive to be used as general feed stock but once the oil has been pressed out the remaining seed cake is still nutritious.

The plant itself has not been used as fodder as too much makes animals sicken, and due to its unpleasant taste they will not eat it unless there is no other food available. The soft core of the cannabis plant which remains after the fibres are removed provides good animal bedding which can absorb more moisture than either straw or wood shavings.

Boiled cannabis seed is frequently used by British sport fishermen.


In the survey-year ending March 2014, possession of cannabis offences accounted for 67% of all police recorded drug offences in the UK.

In 2015, County Durham police announced that they will no longer be targeting people who grow cannabis for personal consumption unless they are being "blatant". Derbyshire, Dorset and Surrey police announced that they will also be implementing similar schemes. The move is in response to significant budget cuts, which means police forces are having to prioritise more pressing areas.

According to figures obtained through a Freedom of Information request, there are large differences by county regarding how many cases actually result in an offender being charged. In 2016, Hampshire police had the most charges at 65%, while Cambridge had the lowest proportion of charges at only 14%.

Medical use

Medical use of cannabis was legalised in the UK on 1 November 2018, after the cases of two epileptic children who benefited from using cannabis brought increased public attention to the issue. The children (Billy Caldwell, 12, and Alfie Dingley, 6) both experienced significant improvement in their conditions after they began using cannabis, but were initially not allowed to continue their treatment under UK law. This led to increased public outcry, particularly in the case of Billy Caldwell who was hospitalised with life-threatening seizures after his medication was confiscated by authorities.

On 20 June 2018, then Health Secretary Jeremy Hunt announced his support for the medical use of cannabis and that a review would be undertaken to study changes to the law. On 26 July 2018, Home Secretary Sajid Javid announced that cannabis products would be made legal for patients with an "exceptional clinical need", and that cannabis would be moved from a Schedule I classification to Schedule 2. On 11 October, the new provisions were officially presented and accepted in the House and the policy came into effect on 1 November 2018.

A licence is available from the home office to import prescribed medicinal cannabis. However, as of mid-February 2019, virtually no-one has been able to access medical cannabis. However, the first stand alone CQC registered cannabis clinic was opened by Sapphire medical in December 2019, since then a number of private clinics have opened across the UK. It has been estimated that between October 2018 and 2019 there has been 204 prescriptions for unlicensed cannabis medicines.

The law stipulates that GPs are not allowed to prescribe cannabis-derived medicines. Treatment must be initiated by a specialist consultant and may be continued under sharedcare by a GP or non-medical prescriber. NHS guidance states that medical cannabis should only be prescribed when there is clear published evidence of its benefit and other treatment options have been exhausted.

Sativex is an approved cannabis-derived medicine and is indicated for the treatment of spasticity caused by multiple sclerosis and chemotherapy-induced nausea and vomiting. Nabilone is another cannabinoid drug that has been approved by the Medicines and Healthcare products Regulatory Agency (MHRA), but is a synthetic form of THC and not naturally derived from the plant. Nabilone can be prescribed to treat nausea and vomiting caused by cytotoxic chemotherapy.

Cannabidiol (CBD) oil is legal for use and sale in the UK without a prescription, as long as when it is sold to the public it is not sold as medicine and it does not contain more than 0.01% THC. This reference has been researched in depth following many businesses being closed that are selling CBD with THC levels of less than 0.2%W/v. The 0.2% reference is commonly misunderstood as the government pages arent clear. 0.2% is only allowed for cultivation of plants NOT for sale of CBD. The CBD drug Epidiolex is approved for use in the EU.

On 31 October 2020, it was reported that the NHS has been repeatedly refusing to fund medical cannabis for children with severe epilepsy. It was reported that at least twenty families are paying for private prescriptions after not being provided by the NHS. One family reported paying £2,000 a month for their 11-year-old daughter, who had been suffering up to 300 seizures a day. Doctors put her into an induced coma and transported her to intensive care. After an anonymous donation was given to one of the child's parents of £2,500, the parent bought cannabis oil for their child, who after taking it was allowed home within two days. The Department of Health and Social Care said more research is needed before it can routinely prescribed cannabis-based medicines. Peter Carroll, of End Our Pain said there are dozens more families in a similar position or unable to pay for the drugs at all.

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