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Drug & Alcohol Policy UK: Employer Guide 2025

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Part ofUK Employment Law Guide for Employers (2025)

Written by Brad Askew Solicitor (non-practising)
Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice.
Updated June 2026 · England & Wales
Substance misuse at work is one of those issues most employers hope they will never have to deal with, until the day they do. A clear, written drug and alcohol policy gives your business a framework to handle these situations fairly, lawfully, and without the panic of making it up on the spot. It sets expectations for staff, protects colleagues and customers, and helps you meet your health and safety obligations under UK law. On this page I walk through what a good policy should cover, the legal backdrop employers need to understand, and the practical decisions you will need to make before putting pen to paper. If you want to talk any of it through, a phone call with an experienced legal adviser is available at the bottom of the page.

What this document is

A drug and alcohol policy is a written workplace document that sets out how your business handles the use, possession, or influence of alcohol and drugs during working hours or on company premises. It typically explains what conduct is prohibited, how concerns will be raised and investigated, when testing may be used, and what support is available to employees who disclose a dependency issue.

The policy sits alongside your disciplinary procedure and your health and safety arrangements rather than replacing either. Think of it as the rulebook that tells staff where the line is and tells managers what to do when someone crosses it.

For safety-critical industries such as construction, transport, logistics, or manufacturing, a policy is effectively essential. For office-based businesses it is still strongly recommended, because the consequences of handling an incident badly, unfair dismissal claims, discrimination complaints, reputational damage, can be costly and avoidable.

How to use this document

  1. Decide the scope and standards. Work out who the policy applies to (employees, contractors, visitors), when it applies (working hours, company vehicles, off-site events), and what behaviour you will prohibit. Be specific about alcohol at work functions, prescription medication that could affect performance, and being unfit for duty due to after-hours consumption.
  2. Set out your approach to testing. If you intend to use drug or alcohol testing, say so clearly. Explain the circumstances, for example pre-employment, post-incident, for-cause, or random in safety-critical roles, and confirm that testing will be carried out with consent and in line with data protection law. Testing without a clear policy basis is risky.
  3. Build in a support route. A policy that only punishes will push problems underground. Include a confidential route for employees to raise dependency concerns, reference access to occupational health or an employee assistance programme, and explain how you will handle time off for treatment. This also helps you manage disability discrimination risk where addiction overlaps with other medical conditions.
  4. Link it to your disciplinary procedure. Make clear which breaches are treated as gross misconduct, which may lead to a warning, and how investigations will be handled. Consistency matters here. If one manager sends someone home and another ignores the same behaviour, you lose the protection the policy was meant to give you.
  5. Communicate, train, and review. Issue the policy to all staff, get acknowledgement where possible, and brief line managers on how to recognise concerns and hold the right conversations. Review the document at least every couple of years, or sooner if legislation, your industry, or your workforce changes materially.

Common questions

Q Is a drug and alcohol policy a legal requirement in the UK?
There is no single law that says every employer must have one, but the Health and Safety at Work Act 1974 requires you to protect the health, safety, and welfare of staff so far as reasonably practicable. In practice, having a written policy is the most straightforward way to evidence that you have thought about the risk and put reasonable measures in place, particularly in safety-sensitive sectors.
Q Can we drug test employees without their consent?
Generally no. Testing normally requires the employee's informed consent, which is usually built in through the contract of employment or a clearly communicated policy. Testing also involves processing special category health data, so you need a lawful basis under UK GDPR and appropriate safeguards. Refusing a reasonable test under a properly drafted policy can itself be a disciplinary matter.
Q What about prescription and over-the-counter medication?
Your policy should ask employees to tell their manager, confidentially, if prescribed medication could affect their ability to work safely, particularly in roles involving driving, machinery, or care responsibilities. This lets you adjust duties temporarily rather than treating it as misconduct, and helps you meet reasonable adjustment duties where a disability is in play.
Q Is alcohol dependency treated as a disability?
Addiction to alcohol or non-prescribed drugs is specifically excluded from the definition of disability under the Equality Act 2010. However, medical conditions caused or worsened by dependency, such as liver disease or depression, can themselves be disabilities. This is why a supportive, case-by-case approach tends to work better than a purely punitive one.
Q How does the policy apply to work events and Christmas parties?
Work social events are still work, legally speaking, and employers can be liable for what happens at them. Your policy should set expectations about acceptable behaviour at company-organised events where alcohol is served, remind staff that gross misconduct rules still apply, and think about practical measures like transport home and supervision if you are providing a free bar.
Q What should managers do if they suspect someone is under the influence at work?
The usual approach is to remove the person from any safety-critical task, hold a private conversation, arrange a safe route home, and start a proper investigation before deciding on any action. Confronting or accusing someone in front of colleagues almost always makes things worse and can undermine a later disciplinary process. Your policy should give managers a clear script to follow.
Q How often should the policy be reviewed?
I'd suggest a full review at least every two years, plus an earlier look if the law changes, if you move into a new sector or regulated activity, or if an incident exposes a gap. Keeping a note of each review date on the document itself is useful evidence that the policy is a live part of your health and safety arrangements rather than something filed and forgotten.

Sources

This guide is based on primary UK law and official guidance.

Brad Askew, Solicitor (non-practising)

Written & reviewed by

Brad Askew Solicitor (non-practising)

Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.

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Legal disclaimer
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.