Journey
Responding to CDM enforcement action
What to do when HSE takes enforcement action or investigates your construction site for CDM breaches. Covers improvement notices, prohibition notices, prosecution, and preventing future enforcement.
If HSE has taken enforcement action or is investigating your site
Receiving enforcement action from the Health and Safety Executive (HSE) is serious. As a construction business, you have legal obligations under the Construction (Design and Management) Regulations 2015 (CDM 2015) and the Health and Safety at Work Act 1974.
Warning: If you have received a prohibition notice, you must stop the specified activity immediately. Operating in breach of a prohibition notice is a criminal offence.
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Identify what type of enforcement action you have received
HSE has a range of enforcement powers. Understanding what you are facing helps you respond appropriately.
Types of HSE enforcement action
Enforcement type What it means Your response Verbal advice Inspector identifies issues but no formal action taken Address issues promptly to avoid escalation Notification of contravention Written record of breaches found during inspection Remedy issues; no formal deadline but creates evidence trail Improvement notice Legal notice requiring you to remedy a breach by a specified date Comply by deadline (minimum 21 days) or appeal within 21 days Prohibition notice Legal notice requiring immediate stop to a dangerous activity Stop immediately. No time limit. Appeal does not suspend notice (unless the tribunal directs otherwise - rare). Prosecution Criminal charges for serious or persistent breaches Seek legal advice immediately. Attend court. Unlimited fines possible. -
If you have received an IMPROVEMENT NOTICE
An improvement notice means HSE has identified a breach of health and safety law. You must remedy the breach by the date specified on the notice.
Your options when you receive an improvement notice
- Comply with the notice - Remedy the breach by the deadline. Notify HSE when complete. Provide evidence of compliance.
- Appeal the notice - You have 21 days to appeal to an employment tribunal. An appeal suspends the improvement notice until the tribunal decides.
- Request an extension - If you cannot comply by the deadline, contact the issuing inspector to request more time. They may agree if you show good faith effort.
What happens if you do not comply
- HSE may prosecute for failing to comply with an improvement notice
- Penalty: unlimited fine and/or up to 2 years imprisonment
- You may also face prosecution for the original breach
- HSE publishes conviction details - reputational damage
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If you have received a PROHIBITION NOTICE
A prohibition notice is the most serious form of enforcement action short of prosecution. It means HSE believes there is a risk of serious personal injury if the activity continues.
Immediate actions for prohibition notice
- Stop the specified activity immediately - Do not wait, even if you disagree with the notice
- Inform all affected workers - Make sure no one continues the prohibited activity
- Barricade or isolate the area - Prevent accidental resumption
- Do not resume until the risk is eliminated - The notice remains in force until HSE withdraws it or a tribunal cancels it
Appealing a prohibition notice
You have 21 days to appeal to an employment tribunal. However:
- The prohibition notice remains in force during the appeal - you cannot resume the activity unless the tribunal directs the notice be suspended pending the appeal (this is rare and must be applied for)
- The tribunal may modify, affirm, or cancel the notice
- If you lose the appeal, you may be ordered to pay HSE's costs (for example where the appeal had no reasonable prospect of success)
- Seek legal advice before appealing
What happens if you ignore a prohibition notice
- Criminal prosecution is almost certain
- Penalty: unlimited fine and/or up to 2 years imprisonment
- Directors can be personally liable if they consented to or connived at the breach
- Insurance may be voided for deliberate non-compliance
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If you are being PROSECUTED
Prosecution means HSE believes the breach is serious enough to warrant criminal charges. This can happen for:
- Serious breaches of CDM 2015 or other health and safety law
- Persistent failure to comply with enforcement notices
- Incidents resulting in death or serious injury
- Deliberate or reckless disregard for safety
What to expect during prosecution
- HSE investigation - Inspectors gather evidence, interview witnesses, request documents
- Summons or charge - You receive formal notice of the charges against you
- First hearing - Magistrates' court for plea and case management
- Trial - Either in magistrates' court or Crown Court for serious cases
- Sentencing - If convicted, the court determines the penalty using the Sentencing Council's Health and Safety Offences Definitive Guideline, which sets fines by reference to the organisation's turnover, culpability and harm
Potential penalties on conviction
Offence Maximum penalty CDM 2015 breach (summary conviction) Unlimited fine CDM 2015 breach (conviction on indictment) Unlimited fine and/or 2 years imprisonment Corporate manslaughter Unlimited fine + remedial order + publicity order Gross negligence manslaughter (individuals) Life imprisonment Director and senior officer liability
Under section 37 of the Health and Safety at Work Act 1974, if a company commits an offence with the consent, connivance, or neglect of a director, manager, or similar officer, that individual can be prosecuted personally. Directors have received custodial sentences for construction safety failures.
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Complete remedial action
Whatever enforcement action you have received, you need to remedy the underlying breach. Common CDM compliance failures include:
Review your CDM 2015 compliance
Comprehensive guide to CDM requirements - check you are meeting all your duties as client, principal designer, principal contractor, designer, or contractor.
Common breaches requiring remediation
- No construction phase plan - Prepare one before work continues
- No written appointments - Issue formal appointment letters for Principal Designer and Principal Contractor
- Missing pre-construction information - Gather and share site information with designers and contractors
- Failed to notify HSE - Submit F10 notification immediately if project is notifiable
- Inadequate welfare facilities - Provide toilets, washing, drinking water, rest areas
- Work at height failures - Install edge protection, inspect scaffolds, provide training
- Asbestos management failures - Commission survey, engage licensed contractor if needed
Your duties as a CDM client
If you are commissioning construction work, understand your specific legal responsibilities under CDM 2015.
Create a construction phase plan
If you need to prepare or update your construction phase plan, this guide explains the requirements.
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Notify HSE of compliance
When you have completed remedial work:
- Contact the issuing inspector in writing - Confirm you have complied with the notice
- Provide evidence - Photos, training records, equipment certificates, updated risk assessments
- Request confirmation - Ask HSE to confirm the notice is satisfied
- Keep all documentation - You may need it if there are future inspections or disputes
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Prevent future enforcement action
Once you have addressed the immediate issue, review your systems to prevent recurrence. Enforcement action creates an evidence trail - HSE will look more closely at future projects.
Construction site health and safety
Essential requirements including work at height, asbestos, manual handling, welfare facilities, and RIDDOR reporting.
Managing CDM compliance
Journey through ongoing CDM compliance - from identifying your role to construction phase planning.
Actions to strengthen compliance
- Review all current projects - Check CDM compliance on every site
- Update risk assessments - Ensure they reflect current work activities
- Improve supervision - Increase management oversight on site
- Train your people - Ensure everyone understands their CDM duties
- Document everything - Keep records of appointments, plans, assessments, training
- Engage competent help - Consider CDM advisors if you lack in-house expertise
Getting help and advice
HSE construction guidance (opens in a new tab)
Official HSE guidance on CDM 2015 compliance and construction health and safety.
Find a solicitor (opens in a new tab)
If you are facing prosecution or need legal advice on enforcement action.
Association for Project Safety (opens in a new tab)
Professional body for CDM advisors and health and safety professionals in construction.
Institution of Occupational Safety and Health (IOSH) (opens in a new tab)
Find a chartered safety professional if you need expert help with compliance.
Prevention is better than cure
Enforcement action is disruptive, expensive, and damages your reputation. Most CDM breaches are preventable with proper planning and competent appointments.
Key points to remember:
- CDM applies to ALL construction projects - there is no 'small job' exemption
- A prohibition notice means stop immediately - no exceptions
- You have 21 days to appeal improvement notices, but compliance is usually better
- If facing prosecution, get legal advice before speaking to HSE
- Directors can be personally liable for CDM failures
- Good compliance systems protect you, your workers, and your business