Mental health conditions affect 1 in 6 workers in any given week. This guide covers the UK legal framework, Mental Health First Aid, the Thriving at Work standards, employer duties under the Equality Act, and practical steps to build a mentally healthy workplace.
Mental Health at Work: UK Employer Guide
The Scale of the Issue
Mental health is the leading cause of sickness absence in the UK:
1 in 6 workers experience mental health problems in any given week (Mental Health Foundation, 2023)
Mental ill health costs UK employers £56 billion per year (Deloitte/Mind, 2022) — through sickness absence, presenteeism, and staff turnover
300,000 people with long-term mental health problems lose their jobs each year (Thriving at Work review, Stevenson-Farmer, 2017)
Investing in mental health support returns £5.30 for every £1 spent (Deloitte, 2022)
Legal Framework
Equality Act 2010
Mental health conditions that have a substantial, long-term (12+ months) adverse effect on day-to-day activities qualify as a disability under the Equality Act. This covers:
Depression
Anxiety disorders
Bipolar disorder
PTSD
OCD
Schizophrenia
Eating disorders
Employer duties apply: reasonable adjustments, non-discrimination, no direct or indirect discrimination.
Health and Safety at Work Act 1974
Employers have a duty to ensure the health, safety, and welfare of employees, which the Health and Safety Executive (HSE) interprets as including mental health. The HSE's Management Standards for Work-Related Stress provide a framework for risk assessment.
Six key stressors identified by HSE:
Demands — workload, hours, pace
Control — how much say employees have
Support — from managers and colleagues
Relationships — including bullying and harassment
Role — clarity of responsibilities
Change — how change is communicated
The Thriving at Work Standards
The 2017 Stevenson-Farmer review commissioned by the government produced the Thriving at Work framework, with six core standards for all employers and four enhanced standards for larger organisations.
Core Standards
Produce, implement, and communicate a mental health at work plan
Develop mental health awareness among employees
Encourage open conversations about mental health and the support available
Provide good working conditions
Promote effective people management (managers trained and supported)
Routinely monitor employee mental health and wellbeing
Enhanced Standards (for larger employers)
Increase transparency and accountability through internal and external reporting
Ensure tailored in-house mental health support and sign-posting
Mental Health First Aid (MHFA)
Mental Health First Aid England (MHFA England) trains workplace Mental Health First Aiders — employees who are trained to:
Recognise signs of mental ill health
Have a supportive conversation
Signpost to professional help
Follow up appropriately
Certification Levels
MHFA Champion (4 hours): Awareness-raising role
MHFA First Aider (2 days): Full certification; can respond to mental health crises
MHFA Instructor: Can deliver MHFA training internally
Government commitment: The government announced in 2023 its intention to require all businesses with 50+ employees to have a trained Mental Health First Aider.
Best practice: One MHFA First Aider per 50 employees; visible, named, and communicated to all staff.
Employee Assistance Programmes (EAPs)
An EAP provides employees with confidential access to:
Short-term counselling (typically 6–8 sessions)
Legal and financial advice
Health and wellbeing support
Uptake: The average EAP utilisation rate is 3–5% annually. High-performing employers achieve 15–20% through active promotion.
Cost: £25–£80 per employee per year depending on provider and scope.
Popular UK EAP providers: Bupa, Health Assured, Optum, Workplace Options.
Reasonable Adjustments for Mental Health
Common adjustments that make a significant difference:
Condition
Adjustment
Anxiety
Flexible start time, advance warning of meetings, written agenda
Depression
Phased return to work, reduced hours during recovery, adjusted targets
PTSD
Remote working option, noise-reducing environment, designated safe space
Bipolar disorder
Flexible working to manage energy levels, awareness training for manager
OCD
Written procedures for tasks, reduced pressure on speed
All conditions
Regular 1:1 check-ins, signposting to EAP, Workplace Adjustments Passport
Access to Work Mental Health Support Service can fund up to 9 months of professional support — entirely separate from the employer's own adjustments.
Manager Training
Line managers are the most important factor in whether employees with mental health conditions thrive or leave. Recommended training:
Mental Health Awareness (half day): Understanding common conditions, signs to look for, how to have a supportive conversation
Managing Wellbeing Conversations (half day): How to ask "how are you?" and mean it; when to escalate
Return to Work (half day): Supporting employees returning after mental health-related absence
Free resources: Mind (mind.org.uk/workplace), Mental Health at Work Commitment (mentalhealthatwork.org.uk), ACAS Mental Health guidance.
Sources: Mental Health Foundation Workplace Mental Health 2023, Deloitte/Mind Mental Health and Employers 2022, Stevenson-Farmer Thriving at Work Review 2017, HSE Management Standards, MHFA England, ACAS