Why Clear Drug Testing Policies Matter: Lessons From a Police Misconduct Case

Why Clear Drug Testing Policies Matter: Lessons From a Police Misconduct Case

This article is for general educational purposes only and does not constitute legal or medical advice. Details of the case are based on BBC reporting and are correct at the time of writing (November 2026). If you have concerns about drug use, please speak to a healthcare professional.

A clear drug testing policy is what allows an employer to act quickly and fairly when a test comes back positive. A recent case at Cumbria Police shows how this works in practice: a detective sergeant was picked for a random drug test, tested positive for a cocaine metabolite and has now been barred from policing for life.

Most employers won't have an anti-corruption unit or a misconduct panel, but they do face the same questions. If your policy doesn't answer those questions before a test takes place, you could be left making up the rules around a real employee and a real result. This guide looks at what happened and the lessons for anyone running workplace drug testing in the UK.

What happened in the Cumbria Police drug testing misconduct case?

According to the BBC's report, the officer was selected for a random drug test by the force's anti-corruption unit in August. He resigned days before his misconduct hearing, but the hearing still went ahead and the panel found gross misconduct.

Stage of the case	What was reported
How the test came about	Random selection by the force's anti-corruption unit
Urine sample	Provided around three hours after he first said he couldn't, with extra time and fluids allowed
Result	Benzoylecgonine at 940 ng/mL, against a reported positive threshold of 150 ng/mL
The officer's account	He admitted the case in full, showed remorse and described an isolated incident while off duty, under significant stress and affected by alcohol
Outcome	He would have been dismissed had he not resigned, and was placed on the barred list, which stops him serving with any police force

What is benzoylecgonine? It is the substance the body produces when it breaks down cocaine. Finding it shows that cocaine has been used, but it doesn't measure how impaired someone was at the time of the test. This is why your policy needs to set out exactly what counts as a breach.

Why a clear drug testing policy matters for UK employers

Police forces work within their own regulations, which permit random testing of serving officers but don't make it mandatory. Most employers have no equivalent framework, so their written policy, their employment contracts and their employees' informed consent have to do that job instead.

A good policy also makes it much harder for anyone to claim they didn't know the rules. In an August 2026 case, a Greater Manchester Police officer who tested positive for cocaine and cannabis was found to have acted knowing that he was breaching the force's drug and alcohol misuse policy.

The Health and Safety Executive recommends that organisations agree a policy on drug and alcohol misuse. It can form part of your wider health and safety policy, but it should reflect your own workplace and risks rather than being copied from a generic template.

Lesson 1: Decide where your drug testing policy stands on off-duty drug use

The officer said he took the drug while off duty, but this didn't change the outcome. The report's reasoning was that an officer who uses drugs can't be relied on to keep themselves, colleagues or the public safe.

That reasoning is specific to policing, where standards apply both on and off duty. A private employer can't assume the same approach will apply automatically, so your policy should say plainly what you expect:

• Does the rule focus on being fit for work, on having a substance in the system, or both?
• Are some roles held to a stricter standard, such as drivers or machinery operators?
• How will you treat prescribed or over-the-counter medicines that could affect a result or safe working?

Remember that a drug's detection time can outlast its effects, and differs between urine and saliva. A positive urine test may reflect use from days earlier, so your choice of drug test type should match what you are trying to find out.

Lesson 2: Cover what happens if someone can't provide a drug test sample

The officer first said he couldn't provide a urine sample, then provided one around three hours later after being given more time and fluids. It is a simple detail, but one many workplace policies miss. Your procedure should spell out how long someone will be given, how much they can drink and who stays with them.

Extra fluids can also dilute a urine sample. There is no suggestion of tampering in this case, but it is a good reason to use a kit with built-in sample checks. Our ALLTEST 13 panel cup includes a temperature strip and an adulteration strip that checks oxidants, pH and specific gravity.

Your policy should also explain how a refusal will be treated. In a separate case, a senior Metropolitan Police commander was found to have committed gross misconduct for refusing to provide a sample, even though a panel cleared him of using the drug. An employer can't force anyone to take a test, so the consequences of refusing need to be clear and agreed in advance.

Lesson 3: Make random drug testing fair, justified and actually used

The Cumbria test was random, which helps to protect against claims that someone was singled out. Employers should be able to show how random selection works, who carries it out and which roles are included. Random testing also needs to be necessary and proportionate to the risks of the job, and shouldn't be introduced simply because an employer wants it.

A policy has to be used as well as written. A police inspectorate report found that Thames Valley Police had a policy allowing random testing, but wasn't carrying out any at the time of the inspection. The inspectors said that this was missing opportunities to deter substance misuse, particularly as the force saw it as one of its main corruption risks.

Key takeaway: if your policy says that testing can take place, make sure that you have the kits, trained staff and written procedure in place to carry it out. Our online drug test training can help your team to feel confident doing this.

Lesson 4: Set out drug test cut-offs and laboratory confirmation in advance

The reported result was over six times the 150 ng/mL threshold, which made the finding hard to dispute. Your policy should also name the cut-off levels it relies on, because these can differ between tests. Our 13 panel cup, for example, screens for cocaine at 300 ng/mL, and a laboratory may report against a different threshold.

A rapid drug test is a screening test, not final proof. Every non-negative result should go for laboratory confirmation before any disciplinary decision is made. This gives you a reliable result and a clear record if the employee disputes it.

Disputes do happen. In September, a Lincolnshire officer blamed his positive cocaine result on contact with drug users through his work, but was found guilty of gross misconduct after a toxicologist said it was most plausible that he had taken the drug. Having strong evidence in place protects both the employer and the employee.

Lesson 5: Include support as well as disciplinary steps in your drug and alcohol policy

The officer told the panel that he had been under significant stress and that alcohol was also involved. In policing, gross misconduct can end a career regardless of those circumstances, but other employers have more choice about how they respond.

A strong policy explains the possible consequences of a breach and also tells staff how to ask for help before a test ever takes place. It should cover who employees can speak to in confidence, whether disclosing a problem will be treated differently from a positive test, and what support services are available.

Alcohol belongs in the policy too. If it is part of your risk, you can screen for it with workplace alcohol test kits or combined drug and alcohol test kits.

Workplace drug testing policy checklist for employers

Use this checklist to see whether your drug and alcohol policy would hold up if a test came back positive tomorrow.

Policy area	Question to answer
Scope	Who does the policy cover, and does it apply to off-duty use?
Consent	How is informed consent obtained and recorded?
Types of testing	Will you use pre-employment, random, for-cause or post-incident testing, and why?
Sample collection	What happens if someone can't provide a sample or refuses?
Results	Which substances and cut-offs apply, and how are results recorded?
Confirmation	Which accredited laboratory will confirm non-negative results?
Disciplinary process	What are the possible outcomes, and who makes the decision?
Support	How can employees ask for help, and how is this kept confidential?
Review	When will the policy be reviewed, and who is responsible for it?

If you are starting from scratch, our starter package brings together rapid screening devices and UKAS-accredited confirmation kits for the two-step testing process.

Workplace drug testing policies: frequently asked questions

Can UK employers carry out random drug testing at work?

Random testing may be appropriate where it is justified by the risks of the role and set out in a clear policy. It should be necessary, proportionate and carried out with informed consent. See our guide to random drug testing for more detail.

Can an employee be disciplined for off-duty drug use in the UK?

This depends on the role, the employment contract and the wording of the policy. Employers should take HR or legal advice, particularly where the drug use has no clear link to safety or the employee's job.

What should employers do if someone can't provide a urine drug test sample?

Follow the procedure in your policy, which should set out reasonable time limits and how much the person can drink. Record what happened, and consider whether a saliva drug test would be a suitable alternative if your policy allows it.

Is a positive workplace drug test enough to dismiss someone in the UK?

A rapid screening result shouldn't be used on its own. Non-negative results should be confirmed by a UKAS-accredited laboratory, and any disciplinary action should then follow a fair process in line with your policy and the Acas Code of Practice.