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PatientsCann UK® · Patient & Employer Guide
Medical Cannabis & Employment
Your rights, your duties, and the law. This guide is for medical cannabis patients and employers across all four UK nations. It covers telling your employer, drug testing, driving for work, safety-critical jobs, and the landmark 2026 court ruling.
Landmark Ruling · May 2026 · Employment Appeal Tribunal
Truman v SPL Powerlines & Network Rail [2026] EAT 54
A medical cannabis patient banned from the rail industry after testing positive for prescribed THC has won a significant victory at the EAT. This ruling changes the legal landscape for every CBPM patient in safety-critical employment. Industry certification bodies are now confirmed as 'qualifications bodies' bound by full equality law.
This guide is for patients and employers. It covers telling your employer, drug testing, driving for work, safety-critical jobs, and the landmark 2026 ruling. The guidance applies right across the UK. But the law is not the same everywhere. Use the buttons below to see the rules for your part of the UK.
By mid-2026, an estimated 60,000 to 75,000 people in the UK had a medical cannabis prescription.1 So many employers now have staff who are patients. Having a prescription does not stop you doing a job on its own. The law says each person must be looked at as an individual. Blanket bans are not allowed.
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Guidance for Patients: Your Employment Rights
What you must tell your employer, what you can keep private, and how the Equality Act protects you.
You usually do not have to tell your employer
In most jobs, you do not have to tell your employer that you take prescribed medical cannabis. Your health information is private. The main exception is work that affects safety, such as operating heavy machinery. Some industries also have their own rules. If none of these apply to you, your prescription is your own business. Treat it like any other private medicine.
If you choose to tell them, get advice first
You might decide to tell your employer. This could be your own choice, or your job might need it. Either way, get advice before you do. You can ask a trade union rep, your cannabis clinic, or an employment lawyer. Once you have told them, you cannot take it back. So think carefully about when you say it, how you say it, and what you agree to share.
Equality law protects you
Medical cannabis is often prescribed for conditions like chronic pain, MS, PTSD, or epilepsy. Many of these count as a disability under UK law.2 This means your employer must not treat you unfairly because of your condition. They also have a duty to think about reasonable adjustments. These are changes that help you do your job, such as flexible hours, a private space to take your medicine, or lighter duties. The exact law that applies depends on where you work, as set out below.
If you face a drug test, get ready early
Some employers test staff for drugs. If yours does, you can tell them in advance that your medicine may show up as THC in a test. Give them proof, such as a letter from your clinic or a copy of your prescription. Your employer cannot force you to hand over your prescription. But sharing proof early can stop a positive test from being treated as bad behaviour.
Stay safe: your duties still apply
A prescription does not remove your duty to work safely. Health and safety law across the UK says every worker must take care of their own safety and the safety of others around them. If your medicine affects how safely you can work, talk to your employer or your clinic about changes that could help.
You can carry your medicine lawfully
If your medical cannabis is prescribed, you are allowed to have it and carry it. The Misuse of Drugs Act 1971 controls cannabis, but it includes an exemption for prescribed medicine.4 Keep your medicine in its original pharmacy box with the label on it. This makes it easy to show that it is yours.
England & Wales. You are protected by the Equality Act 2010. It sets out what counts as a disability (s.6) and says your employer must think about reasonable adjustments (s.20).2 Claims are heard by the Employment Tribunal.
Scotland. The Equality Act 2010 applies in the same way as in England & Wales, including the duty to make reasonable adjustments. Claims are heard by the Employment Tribunal in Scotland.
Northern Ireland. You are protected by the Disability Discrimination Act 1995.8 It protects disabled people from unfair treatment at work and gives you the right to reasonable adjustments. Claims are heard by the Industrial Tribunal.
As a patient, you should be treated the same as anyone else with a health condition. If you feel you are being treated unfairly, or you feel under pressure, you can get help. Contact ACAS, your trade union, or a specialist employment lawyer.
Guidance for Employers
Your legal duties, the steps to take, and how to support staff who hold a prescription while keeping the workplace safe.
Obtain consent before requesting medical information
Ask for an employee's or applicant's clear consent before you ask for any health information, including medicines they take. Health information is sensitive personal data under UK GDPR. Equality law also says you must not ask about health when hiring, apart from a few set reasons. One example is where the health information is needed to check the person can do a task that is a core part of the job.
Use occupational health, not HR or managers
When someone tells you about a medical cannabis prescription, a qualified occupational health professional should review it, not HR staff or line managers. This keeps the employee's information private and keeps you on the right side of the law. Occupational health gives managers advice on what the person can do. They should not pass on the raw prescription or clinic letters.
Carry out a proper risk assessment
Health and safety law says you must check the risks of any medicine that could affect safety at work. Base the check on the actual job. A desk job carries very different risks from a safety-critical one. Review the risk check often, and update it when the person's prescription changes.
Consider your duty to make reasonable adjustments
If an employee's condition counts as a disability under equality law, you may have a legal duty to make reasonable adjustments. These could be changing work hours to fit dosing times, giving a private space for medicine, easing duties for a while, or allowing remote work.
Update your drugs & alcohol policy
Most drug and alcohol policies do not mention lawfully prescribed cannabis. Update yours so it has a clear plan for staff who tell you about a prescription. Cover how you handle what they tell you, how occupational health is used, what adjustments you offer, and how you treat a test result linked to their medicine. A strict “zero tolerance” rule used on prescribed medicine, with no check on the person, could lead to a disability discrimination claim.
Maintain confidentiality at all times
Keep any health information an employee shares strictly private. Only share it with people who truly need to know. That means occupational health, and the right HR or safety person on a need-to-know basis. Never share it with colleagues, clients, other managers, or security staff without the employee's clear consent.
Staff who use medical cannabis may count as disabled under the Equality Act 2010.2 Treating them worse because of their prescription may be disability discrimination. This includes sacking them for a positive drug test that is linked to prescribed THC. Get legal advice before you take any disciplinary action.
Scotland. The same rules apply as in England & Wales. That is the Equality Act 2010 and the Health and Safety at Work etc. Act 1974. Equality claims are heard by the Employment Tribunal in Scotland.
Northern Ireland. Your duties come from the Disability Discrimination Act 1995 (reasonable adjustments, and the qualifications-body duties at ss.14A & 14B) and the Health and Safety at Work (Northern Ireland) Order 1978 (general duties at arts 4 & 8).8 Equality claims are heard by the Industrial Tribunal. Give your policy its own Northern Ireland section.
A dry herb vaporiser (also called a heated nebuliser) warms the medicine but does not burn it. This means there is no smoke, so indoor smoking and vaping rules do not treat it the same way. A few of these devices are approved as medical devices by the MHRA. It helps to explain that the device gives a prescribed medicine, not smoke. This can ease colleagues' worries.
Workplace Drug Testing & Prescribed THC
What a positive result means for patients, how to handle testing before and during a job, and your rights all the way through.
Expect to test positive, even without a recent dose
THC can stay in your body for up to about 28 days after use. That is far longer than it can affect you. So if you take a CBPM that contains THC, you will very likely test positive on a normal urine or saliva test. It does not matter if you dosed recently. This is expected. On its own, it does not mean you are impaired or have done anything wrong.
Tell them about your prescription first, in writing
If you know a drug test is coming, tell them about your prescription before the test and in writing. Keep a copy of everything you send. Include a letter or note from your clinic that confirms your prescription. Do not rely on saying it out loud. The 2026 Truman ruling shows how important written notice is.9 In that case, the doctor recorded a fail without contacting Mr Truman first. This broke their own rules. A recent tribunal case underlined how important written notice is: the doctor recorded a fail without contacting the patient first, which broke the tester’s own rules.
The Medical Review Officer (MRO) process
Most workplace drug tests use a Medical Review Officer, or MRO. This is a doctor who checks the lab results. If a positive result could be explained by prescribed medicine, the MRO should contact you before recording a fail. Their job is to check there is a real medical reason. If an MRO records a fail without contacting you, their process may be wrong. Challenge it in writing straight away, and point to the prescription you told them about.
A positive test is not automatically misconduct
Say you have told them about a valid prescription, and the positive result fits that prescription. Then a positive test should not be treated as misconduct or a reason to sack you without looking into it further. Doing so without a fair process may lead to an Equality Act claim.Doing so without a fair process may lead to a disability discrimination claim under the Disability Discrimination Act 1995. If you face disciplinary action after a positive test linked to prescribed THC, get legal advice straight away.
Employers: TUC guidance on drug testing
The TUC has clear guidance on drug testing in the workplace.10 It covers when testing is allowed, how to handle results, and staff rights. Employers should read it, along with advice from their occupational health provider, before they act on a positive result that involves prescribed medicine.
Key point from Truman [2026] EAT 54 (England, Wales & Scotland): Always tell them about your prescription in writing before any drug test, and keep copies.9 If an MRO records a fail without contacting you first, challenge it. This may break their own rules. Because Truman applies across these three nations, it can support an Equality Act 2010 claim at the Employment Tribunal.
Key point for Northern Ireland: Always tell them about your prescription in writing before any drug test, and keep copies. If a tester records a fail without contacting you first, challenge it in writing straight away. In Northern Ireland, a claim about how a test was handled would be brought under the Disability Discrimination Act 1995 and heard by the Industrial Tribunal.8
Safety-Critical Roles: Special Considerations
Rail, aviation, nuclear, offshore, blue-light, and other safety-critical work. What patients and employers need to know, including the effect of the 2026 ruling.
Safety-critical roles involve heightened scrutiny
Some jobs are safety-critical. Examples are rail, aviation, nuclear, offshore oil and gas, emergency services, and operating heavy plant. In these jobs, employers have extra legal duties from sector rules and regulators. A risk check for a patient in one of these roles is more detailed than for an office job. It is strongly advised that you tell them about your prescription before you start or carry on in a safety-critical role.
Industry certification bodies are now bound by equality law
After Truman v SPL Powerlines & Network Rail [2026] EAT 54, the law is now clear.9 A body that controls the certification card or licence you need for a safety-critical role counts as a qualifications body under the Equality Act 2010. So it must follow the full Act, including the duty to think about reasonable adjustments.A body that controls the certification card or licence you need for a safety-critical role counts as a qualifications body under the Disability Discrimination Act 1995 (ss.14A & 14B).8 So it must follow that Act, including the duty to think about reasonable adjustments. This is not just your direct employer. It applies to any sector where you need a certificate, licence, or accreditation to work.
Passing a drug test is still a competence standard
The 2026 ruling said the need to pass a drugs and alcohol test is part of the standard everyone in a safety-critical role must meet.9The need to pass a drugs and alcohol test is treated as part of the standard everyone in a safety-critical role must meet. That standard itself cannot be changed under equality law. But how the test is run is a separate matter. In particular, how the MRO deals with prescribed medicine you have told them about can lead to a reasonable adjustments claim. The standard stays the same. The process must be fair.
What CBPM patients in safety-critical roles should do
Always take these steps proactively:
Tell them in writing, every time
Tell them about your prescription in writing at every medical, every test, and every review. Keep all copies.
Get a letter from your clinic
Ask your clinic for a letter. It should confirm your prescription and say that THC may show up in a test.
Expect the MRO to contact you
If a test is positive and you have told them about your medicine, a proper MRO review must contact you before recording a fail.
Challenge a fail with no MRO contact
If an MRO records a fail without contacting you, challenge it in writing straight away. Point to the prescription you told them about, and ask for a review.
Get specialist legal advice early
If you face a certification ban, a job being withdrawn, or disciplinary action, get specialist employment advice as early as you can. Tribunal claims have time limits.
You may have a claim against the certifying body
After Truman, if your certification is refused or taken away over a test result, your claim may be against the certifying body, not just your employer.Following the same reasoning, if your certification is refused or taken away over a test result, your claim may be against the certifying body, not just your employer.
England, Wales & Scotland. A body that controls a certificate, card, or licence you need to work in an industry is a qualifications body under s.53 of the Equality Act 2010. It has a duty to think about reasonable adjustments. The 2026 Truman ruling applies here.9
Northern Ireland. The same kind of duty on certificate and licence bodies comes from the Disability Discrimination Act 1995 (ss.14A & 14B).8 The practical steps are the same across the UK: confirm the prescription and look at the person, not a blanket rule.
Read the full PatientsCann UK analysis of the 2026 ruling and what it means on the Landmark Ruling page. You can also read the official judgment: Truman v SPL Powerlines [2026] EAT 54.9
Driving for Work
Deliveries, care visits, and any job that involves driving. The rules on prescribed cannabis and driving are not the same across the UK. Here is what patients and employers need to know.
England & Wales. It is an offence to drive while impaired under s.4 of the Road Traffic Act 1988.5 Section 5A also makes it an offence to drive with THC above 2 micrograms per litre of blood, even if you are not impaired.6 There is a medical defence. It applies if you took the medicine as your prescriber told you to, and you are not impaired.
Northern Ireland. Under Article 15 of the Road Traffic (Northern Ireland) Order 1995, it is an offence to drive while unfit through drink or drugs.11 There is no set THC limit. The test is whether your driving was actually impaired. A lawful prescription, taken as directed, is strong evidence in your favour.
Detection is not the same as impairment
THC can stay in your blood long after any effect has gone. So a positive reading does not, on its own, prove you were impaired. Wherever you are in the UK, the safe rule stays simple: do not drive if your medicine affects your ability to drive.
Where driving is part of the role
Talk to the employee and their prescriber. A risk check should look at the medicine, the dose, and the timing. Employers can adjust duties where this is needed to keep the employee and other people safe.
The golden rule applies UK-wide: never drive if your medicine affects your ability to drive safely, and always keep evidence of your prescription and dosing instructions with you. See our dedicated Driving & Medical Cannabis guidance for more.
Truman v SPL Powerlines & Network Rail [2026] EAT 54
The first Employment Appeal Tribunal ruling to deal directly with a medical cannabis patient in a safety-critical job. Decided on 1 May 2026 by Mr Justice Soole.
Case Background
The Truman Case: What Happened
Truman v SPL Powerlines UK Ltd & Others [2026] EAT 54 · 1 May 2026
Mr Truman is a rail worker. He was offered a safety-critical job in the rail industry. He held a valid prescription for medical cannabis to manage chronic pain from haemochromatosis, a lifelong condition. It is accepted as a disability under the Equality Act 2010.
He told them about his prescription at his health check. His urine tested positive for cannabis, which was fully expected. The doctor at Express Medicals recorded a fail without ever contacting Mr Truman. This triggered a five-year Sentinel ban and the job was withdrawn at once.
The Employment Tribunal found his THC levels matched prescribed use. It found he could have worked safely with a risk check and normal oversight. It also found the result should have been a pass under Network Rail's own rules. Even so, it dismissed his claims. The EAT put this right on appeal.
England, Wales & Scotland. Truman is binding authority.9 The Employment Appeal Tribunal covers all three nations, so the findings below apply directly here.
Key Outcomes from [2026] EAT 54
The EAT confirmed the right comparison. It was a disabled person who would have passed under the medical exemption. It was not a non-disabled person who tested positive from recreational use. Set against that comparison, a patient whose lawful prescription is treated as a plain fail is put at a real disadvantage. Getting this comparison right is central to a disability discrimination claim. The first tribunal got it wrong on this point.
The Sentinel card is a 'relevant qualification'. It is an authorisation you must hold to do safety-critical work on the railway. The EAT confirmed that Network Rail, as the operator of the Sentinel scheme, is therefore a qualifications body under the Equality Act 2010. So the Act applies to Network Rail in full as the gatekeeper of that card. This includes the duty to think about reasonable adjustments. It applies even if Network Rail does not employ you directly.
This goes well beyond the railway. Any industry body that controls a certificate, licence, or accreditation you need for a job may now be covered by the same rule. Network Rail's appeal against this finding was dismissed.
Mr Truman's reasonable adjustments claim against Network Rail has gone back to the Employment Tribunal for a fresh hearing. The EAT found the first tribunal had not explained its reasoning well enough. The question is whether Mr Truman was put at a substantial disadvantage next to a non-disabled person in the same position. That must now be looked at again, with the right legal analysis. This is an important win on process. The door is open.
Network Rail cannot avoid responsibility for the result of testing done under its policies just because Express Medicals carried out the test. Network Rail sets the policy and controls the Sentinel scheme. It stays responsible for how that policy is applied. This matters for any large organisation that outsources its occupational health or drug testing. You cannot outsource your Equality Act duties.
Mr Truman's appeal on this point was dismissed. The EAT confirmed the need to pass the drugs and alcohol test is part of the competence standard every safety-critical worker must meet. It cannot be waived or changed as a reasonable adjustment. But this is separate from how the test is run. How the MRO deals with prescribed medicine you have told them about is covered by the reasonable adjustments duty. The standard stays. The process must follow equality law.
Express Medicals' appeal on this point succeeded. The EAT found the testing company was not liable under section 111(2) of the Equality Act. That part covers those who cause or push someone into discriminating. It did not apply because Express Medicals had no controlling say over the scheme operator that set the policy. This is a narrow, technical finding on the facts. It does not mean the conduct was acceptable. The findings that the process was not followed, and that the result should have been a pass, still stand.
Read PatientsCann UK's full analysis, including what this means for industries beyond rail: Landmark Ruling for Safety-Critical Roles. Written by Mohammad Wasway, Founder & MD, PatientsCann UK®, 12 May 2026.
Legislation, Guidance & Support Organisations
All key documents, legislation references, and support services for CBPM patients and employers navigating employment law.
Legislation
Equality Act 2010 · s.6
The meaning of disability. It covers many conditions that medical cannabis is prescribed for.
Equality Act 2010 · s.20
Duty to make reasonable adjustments for disabled people.
Equality Act 2010 · s.53
Qualifications bodies. Confirmed to apply to industry certification schemes in Truman [2026] EAT 54.
HSWA 1974 · s.7
Every worker's duty to take care of health and safety. It applies to all staff, including those on prescribed medicine.
Road Traffic Act 1988 · s.4 & s.5A
The impairment offence and set drug limits (2µg/L THC), with a medical defence. England, Wales & Scotland.
Misuse of Drugs Act 1971 · s.5 & s.7
The rule on possession, and the exemption that lets a patient lawfully hold prescribed medical cannabis.
Disability Discrimination Act 1995 (NI)
Northern Ireland's equality law. It gives broadly the same protection. Qualifications bodies are covered by ss.14A & 14B.
HSW (NI) Order 1978 · arts 4 & 8
Northern Ireland's version of the health and safety duties on employers and workers.
Road Traffic (NI) Order 1995 · art. 15
Northern Ireland's drug-driving law. It uses an impairment test, with no set THC limit.
Case Law
Industry Guidance
CIC Cannabis & Employment Guide (PDF)
TUC · Drug Testing in the Workplace
NICE · Schedule 2 Drugs List
Home Office · Drug Licence Factsheet (PDF)
Support Organisations
References
Sources
- PatientsCann UK (2026) Medical cannabis patient numbers in the UK. PatientsCann UK CIC. Available at: https://patientscann.org.uk (Accessed: 13 July 2026).
- Equality Act 2010, c. 15. Available at: https://www.legislation.gov.uk/ukpga/2010/15/contents (Accessed: 13 July 2026).
- Health and Safety at Work etc. Act 1974, c. 37. Available at: https://www.legislation.gov.uk/ukpga/1974/37/contents (Accessed: 13 July 2026).
- Misuse of Drugs Act 1971, c. 38, and the Misuse of Drugs Regulations 2001 (SI 2001/3998). Available at: https://www.legislation.gov.uk/ukpga/1971/38/contents (Accessed: 13 July 2026).
- Road Traffic Act 1988, c. 52, ss. 4 and 5A. Available at: https://www.legislation.gov.uk/ukpga/1988/52/contents (Accessed: 13 July 2026).
- The Drug Driving (Specified Limits) (England and Wales) Regulations 2014 (SI 2014/2868). Available at: https://www.legislation.gov.uk/uksi/2014/2868 (Accessed: 13 July 2026).
- The Drug Driving (Specified Limits) (Scotland) Regulations 2019 (SSI 2019/236). Available at: https://www.legislation.gov.uk/ssi/2019/236 (Accessed: 13 July 2026).
- Disability Discrimination Act 1995, c. 50. Available at: https://www.legislation.gov.uk/ukpga/1995/50/contents (Accessed: 13 July 2026).
- Truman v SPL Powerlines UK Ltd and Others [2026] EAT 54. Employment Appeal Tribunal. Available at: https://www.gov.uk/employment-appeal-tribunal-decisions (Accessed: 13 July 2026).
- Trades Union Congress (2024) Drug testing in the workplace. TUC. Available at: https://www.tuc.org.uk/resource/drug-testing-workplace (Accessed: 13 July 2026).
- The Road Traffic (Northern Ireland) Order 1995 (SI 1995/2994 (N.I. 18)), art. 15. Available at: https://www.legislation.gov.uk/nisi/1995/2994/contents (Accessed: 13 July 2026).
This page is for general information only. It is not legal or professional advice. Using medical cannabis may affect your job. PatientsCann UK suggests you talk to your employer, and that you read your work contract and any policies on prescription medicines. PatientsCann UK is not liable for any work problems that come from using medical cannabis. Always get independent legal advice for your own situation.
