Class B Drugs in the UK: Possession, Supply, and Driving Offences

Class B drugs in the UK carry penalties of up to five years in prison and an unlimited fine for possession, and up to fourteen years and an unlimited fine for supply or production, under the Misuse of Drugs Act 1971.1GOV.UK. Drugs Penalties Those maximums are the headline. The reality for most people charged with simple possession is a fine or a conditional discharge, but the knock-on effects of any conviction, from US travel refusals to disclosure on employment checks, often matter more than the sentence itself.

What Counts as Class B

Schedule 2 of the Misuse of Drugs Act 1971 sets out the full list, which runs to dozens of named substances plus generic definitions written to catch newly invented compounds.2legislation.gov.uk. Misuse of Drugs Act 1971, Schedule 2 The substances most commonly encountered include:

Two substances people often assume are Class B are not. Nitrous oxide was placed in Class C in November 2023.4GOV.UK. Circular 006/2023 – Control of Nitrous Oxide Under the Misuse of Drugs Act 1971 Khat has been Class C since 2014.5GOV.UK. Khat to Be Made a Class C Drug Cannabis also has a lawful route: cannabis-based products for medicinal use can be prescribed by a specialist on the GMC Specialist Register, and from January 2026 police guidance across the 43 forces in England and Wales instructs officers to begin from the assumption of lawful medical use when they encounter someone with a prescription.6NHS England. Cannabis-Based Products for Medicinal Use (CBPMs)

Possession Penalties in Practice

The statutory maximum for possessing a Class B drug for personal use is five years in prison, an unlimited fine, or both.1GOV.UK. Drugs Penalties The maximum is rarely imposed. Around 60 per cent of people convicted of Class B possession receive a fine, and roughly another 20 per cent receive a conditional discharge, which means no punishment follows provided they do not reoffend within a set period. Immediate custodial sentences are uncommon, and three quarters of those that are imposed last a month or less. The Sentencing Council guideline range runs from a discharge at the bottom to 26 weeks’ custody at the top.7Sentencing Academy. Possession of a Class B Drug

What moves a sentence up or down? Quantity matters. A single joint or wrap is treated more leniently than a stockpile that suggests heavy personal use. Previous drug convictions make a repeat fine less likely and a community order more probable. The five-year ceiling is reserved for very large personal quantities or significant aggravating features.

To secure a conviction the prosecution must prove you had physical custody or control of the drug and that you knew, or should have known, it was a controlled substance. Being near drugs that belong to someone else is not enough, though GOV.UK guidance notes you can be charged with possession “whether they’re yours or not” if caught holding them.1GOV.UK. Drugs Penalties

On top of any sentence, Section 27 of the Misuse of Drugs Act 1971 lets the court order forfeiture and destruction of anything connected to the offence. That covers the drugs themselves and extends to paraphernalia, phones used to arrange deals, and cash found alongside the drugs. A third party claiming ownership of a seized item can ask to be heard before the order is made.8legislation.gov.uk. Misuse of Drugs Act 1971, Section 27

Supply and Production

Manufacturing, growing, or distributing Class B drugs carries a maximum of fourteen years in prison, an unlimited fine, or both.1GOV.UK. Drugs Penalties The law makes no distinction between selling for profit and sharing a bag with a friend. Both count as supply. Growing even a single cannabis plant at home is a production offence.

The Sentencing Council divides supply cases into four harm categories, based on the quantity and type of drug, and three culpability roles. The role assessment often decides the outcome:9Sentencing Council. Possession of a Controlled Drug With Intent to Supply It to Another

  • A leading role, directing or organising supply on a commercial scale, has starting points from 18 months to 8 years depending on quantity.
  • A significant role, operational or managerial within a chain, has starting points from a high-level community order to 5 years 6 months.
  • A lesser role, a limited function performed under direction, pressure, or exploitation, has starting points from a low-level community order to 3 years.

Intent to supply is usually proved on circumstantial evidence: scales, dealer-quantity bags, “tick lists” of debts, bulk cash, and multiple phones. Anyone found to have profited also faces confiscation proceedings under the Proceeds of Crime Act 2002, which can reach assets well beyond what police seized at arrest.

Out-of-Court Disposals

Not every Class B case ends up in court. Police have several tools for dealing with low-level possession without charging anyone, and for cannabis there is a structured escalation.

Cannabis Warnings

A cannabis warning is available for adults caught with a small amount for personal use, provided they have no previous cannabis warning, no previous penalty notice for drug possession, and no prior drug convictions. The warning is logged on the Police National Computer but does not create a criminal record. Most forces allow only one; a second offence triggers a penalty notice or arrest.

Penalty Notices for Disorder

If a cannabis warning has already been given, or for other low-level Class B possession, police can issue a Penalty Notice for Disorder with a fixed fine of around £90. Paying is not a conviction, but the notice is recorded and may shape how future offences are dealt with. Refusing to pay can send the matter to court.

Community Resolutions

A community resolution is the lowest disposal available. It can be used for minor possession where the person admits responsibility and agrees to take part, typically through a drug awareness course or a letter of apology. The person must accept guilt, the offence must be considered less serious, and they must not have had a community resolution for a similar offence in the previous 12 months.10National Police Chiefs’ Council. Guidelines on the Use of Community Resolutions A community resolution can appear on an enhanced DBS check if police consider it relevant to the role being applied for.

Drug Driving Is a Separate Offence

Several Class B substances have specific blood-concentration limits for drivers in England and Wales, set near zero.11GOV.UK. Changes to Drug Driving Law For cannabis (delta-9-tetrahydrocannabinol) the limit is 2 microgrammes per litre of blood. For ketamine it is 20 microgrammes per litre. Even small amounts taken hours earlier can put a driver over the line.

Roadside oral fluid tests screen for cannabis and cocaine. Testing for ketamine and most other drugs needs a blood sample at a police station.12British Transport Police. Alcohol and Drug Driving Refusing to provide a sample is itself an offence and carries the same penalties as a positive test.

Maximum penalties for drug driving are an unlimited fine, up to six months in prison, and an obligatory disqualification of at least 12 months. A previous drink- or drug-driving conviction in the past 10 years raises the minimum ban to three years.13Sentencing Council. Driving or Attempting to Drive With a Specified Drug Above the Specified Limit A drug driving charge sits alongside any possession charge, so both can be pursued at once.

Criminal Records, DBS Checks, and Travel

A Class B conviction leaves a criminal record that follows you for years. How long it shows up depends on the sentence and the type of check.

  • Any conviction that resulted in a prison sentence, including a suspended sentence, is disclosed indefinitely on standard and enhanced DBS checks. Non-custodial drug convictions, which are not on the “specified offences” list for serious violent and sexual crimes, stop appearing automatically after 11 years for adults, provided no further convictions occur in that time.14GOV.UK. DBS Filtering Guide
  • Cannabis warnings and community resolutions are not convictions and do not appear on standard DBS checks. On enhanced checks, police can choose to disclose them if they consider the information relevant.

Travel is where people are most often caught off guard. The UK’s Rehabilitation of Offenders Act, which treats old convictions as “spent” after enough time, has no standing under US immigration law. The US Embassy in London advises anyone who has ever been arrested, cautioned, or convicted to apply for a full visa rather than travelling visa-free under the Visa Waiver Programme or ESTA.15U.S. Embassy and Consulates in the United Kingdom. Ineligibilities and Waivers Answering “no” to the criminal record question on an ESTA when you do have a record risks a permanent bar. Canada, Australia, and Japan also ask about criminal history on their entry or visa applications, and a drug conviction can complicate or block entry.

Getting a Lawyer

If you are charged with a Class B offence, you may qualify for legal aid. Eligibility runs on a means test covering household income, outgoings, and capital. For Crown Court cases, the upper disposable income limit is £37,500 a year. Between £3,398 and £37,500 you can receive legal aid but must contribute from income. Capital above £30,000 may trigger a contribution if you are convicted.16GOV.UK. Work Out Who Qualifies for Criminal Legal Aid

Most straightforward possession cases are heard in the Magistrates’ Court, where means testing is tighter and fewer people qualify. Anyone detained at a police station has the right to free legal advice from the duty solicitor regardless of income. Taking that advice before answering questions is worth doing, even for what feels like a minor cannabis offence. The decisions made in a police interview tend to shape everything that happens afterwards.