Skip to content
Email our experts
About us
Careers
0345 226 8393
Email our experts
0345 226 8393
About us
Careers
Get your FREE consultation
Login
  • I need help with
  • Employment Law & HR
    • I have…
    • No HR team
      • Fixed-Fee Service
      • HR Consultancy
      • HR Software
      • Training
    • Small HR team
      • Flexible Fixed-Fee Service
      • HR Consultancy
      • HR Software
      • Training
    • Established HR team
      • Fixed Subscription Service
      • HR Consultancy
      • HR Software
      • Training
  • Health & Safety
    • I have…
    • No H&S team
      • Fixed-Fee Service
      • Occupational Health
      • CQC Compliance
      • Training
    • Established H&S team
      • Bespoke Services
      • Occupational Health
      • CQC Compliance
      • Training
  • Sectors
  • Resources
  • I need help with
  • Employment Law & HR
    • I have…
    • No HR team
      • Fixed-Fee Service
      • HR Consultancy
      • HR Software
      • Training
    • Small HR team
      • Flexible Fixed-Fee Service
      • HR Consultancy
      • HR Software
      • Training
    • Established HR team
      • Fixed Subscription Service
      • HR Consultancy
      • HR Software
      • Training
  • Health & Safety
    • I have…
    • No H&S team
      • Fixed-Fee Service
      • Occupational Health
      • CQC Compliance
      • Training
    • Established H&S team
      • Bespoke Services
      • Occupational Health
      • CQC Compliance
      • Training
  • Sectors
  • Resources
  • I need help with
  • Employment Law & HR
    • Solutions for HR teams of all sizes

      No HR team

      WorkNest’s fixed-fee fully outsourced HR service provides unlimited 24/7 advice, document drafting, online training, and tools for managing people challenges, making it ideal for those without in-house HR support.

      Fixed fee service | HR consultancy | HR software | Training | eLearning

      Small HR team

      Our unique blend of ER advice, technology, training, and hands-on consultancy will empower your HR function to enhance efficiency, improve the effectiveness of your HR processes and ensure compliance with employment law.

      Flexible fixed fee service | HR consultancy | HR software | Training | eLearning

      Established HR team

      Introducing our sister company: esphr – A new-model employment law service, fusing SRA-regulated legal advice with ER case management technology and online resources. As an extension of your in-house HR and ER team, we provide integrated support services built around people, processes, and technology – all for a fixed annual subscription.

      Employment law advice | Online HR resources | ER case management | HR compliance e-learning | Immigration support

      Latest news & insights

      View the latest articles

      AI for interviews with job candidates | Balancing technology with a human touch

      21st November 2025

      Workplace risks revealed | HSE 2024/25 report shows rising injuries and ill health

      21st November 2025

      CQC under scrutiny | Inspection gaps highlight need for compliance readiness

      12th November 2025

      Duty to prevent sexual harassment | Almost half of UK businesses aren’t compliant

      11th November 2025

      Unconscious bias in the workplace | Lessons from The Celebrity Traitors

      7th November 2025

      Best interview techniques for employers | 5 simple strategies for success

      22nd October 2025
  • Health & Safety
    • Solutions for teams of all sizes

      No Health & Safety team

      Our fixed-fee fully outsourced health & safety support services provide personalised solutions for organisations of all sizes, including dedicated local consultant support, risk management software, online training and 24/7 emergency advice.

      Fixed fee service | Health & Safety software | CQC compliance | Training & e-Learning

      Established Health & Safety team

      Our expert consultants offer customised project support, consultancy, and additional resources to strengthen your health and safety systems, improve claims defensibility, and embed a culture of safety throughout your organisation.

      Support for HSEQ teams | Bespoke services | Health & Safety software | Training & e-Learning

      Latest news & insights

      View the latest articles

      AI for interviews with job candidates | Balancing technology with a human touch

      21st November 2025

      Workplace risks revealed | HSE 2024/25 report shows rising injuries and ill health

      21st November 2025

      CQC under scrutiny | Inspection gaps highlight need for compliance readiness

      12th November 2025

      Duty to prevent sexual harassment | Almost half of UK businesses aren’t compliant

      11th November 2025

      Unconscious bias in the workplace | Lessons from The Celebrity Traitors

      7th November 2025

      Best interview techniques for employers | 5 simple strategies for success

      22nd October 2025
  • Sectors
  • Resources
Contact us
Login
Login

Mental health conditions can be debilitating, impacting all aspects of a person’s life, including their ability to work.

For employers, dealing with the operational consequences can be difficult, and if the employee’s condition qualifies as a disability, there’s also potential for legal action.

In 2019, the average award for disability discrimination was £28,371 – higher than the average award for any other type of Employment Tribunal claim. With so much at stake, employers are understandably anxious about the consequences of mismanaging an employee’s condition.

However, in order to rely on legal protection, an employee’s condition must qualify as a disability. To do so, a person’s mental or physical impairment must have a “substantial and long-term effect on his or her ability to carry out normal day-to-day activities”. Even then, a recent case has shown that in order for a claim to be successful, an employee’s condition must be established as a disability at the time of the alleged discriminatory acts.

Tesco Stores Ltd v Tennant

The claimant in this case, Ms Tennant, was employed by Tesco as a checkout manager. Between September 2016 and September 2017, Ms Tennant suffered with depression, which caused her to be off sick for extended periods. In September 2017, she brought claims for disability discrimination, harassment and victimisation as a result of the treatment she received over the previous 12 months.

Before deciding whether discrimination had occurred, a preliminary hearing was held to determine whether Ms Tennant’s mental health issues amounted to a disability. If not, the claim could go no further. The question here was whether Ms Tennant’s condition was “substantial and long term”.

The “substantial” aspect of this test was not disputed. The Tribunal then turned to the question of whether or not Ms Tennant’s impairment could be said to be “long term”. Under the Equality Act 2010, the effect of an impairment is considered long term if:

(a) It has lasted for at least 12 months;

(b) It is likely to last for at least 12 months; or

(c) It is likely to last for the rest of the person’s life.

Get your FREE consultation

Preliminary hearing and EAT decisions

In the first instance, the Tribunal held that as Ms Tennant’s mental health issues had a substantial adverse effect on her for the 12 months between September 2016 and September 2017, she was considered to be disabled throughout the whole of that period. In other words, the time in which the alleged discriminatory treatment occurred coincided with the 12 months during which the impairment was producing the relevant effect.

However, when Tesco appealed, the Employment Appeal Tribunal (EAT) disagreed with the Tribunal’s interpretation.

In the EAT’s view, during the period in question, Ms Tennant’s impairment and the effects thereof had not yet lasted 12 months. There was also no indication that her depression was likely to last for at least 12 months (or indeed the rest of her life). As such, she was not considered disabled at the relevant time.

Somewhat strangely, the Employment Judge for the preliminary hearing appeared to recognise this fact, stating that: “The time at which to assess the disability, i.e. whether there is an impairment which has a substantial adverse effect on normal day-to-day activities) is the date of the alleged discriminatory act. This is also the material time when determining whether the impairment has a long-term effect.” However, despite this, he had arrived at the wrong conclusion.

Ultimately, Judge Shanks confirmed in the EAT judgment that “one has to look at what is happening at the date of the act of discrimination or harassment which one is addressing, and one has to ask whether, at that date, there has been 12 months of effect.” If there has not, then disability will not be established, and the claimant’s claim will fail. As such, the EAT substituted the Tribunal’s earlier decision and Tesco’s appeal was allowed.

James Tamm

Director of Legal Services

Expert Comment

To a lay person, this may seem like a strange result given that, at the point the claim was started, Ms Tennant appears to have had her condition for at least 12 months. However, the question of long-term effect needs to be asked at the point of each alleged discriminatory act. At that point in time, a judgment needs to be made about whether the condition was likely to last 12 months. The evidence here did not seem to support that.

Whilst this offers some clarification and comfort to employers, in my own experience, the Tribunal will often show a fair degree of latitude to employees with medical conditions. Of course, it is necessary to question whether a particular condition meets the definition of disability, but this is generally not a high bar for a claimant to overcome. As a result, employers should equally focus on the issue of objective justification, particularly in relation to claims for failure to make reasonable adjustments and those for discrimination arising from a disability.

Need step-by-step guidance?

At Ellis Whittam, we’re experts at reducing legal risk. Our highly-qualified Employment Law specialists provide close support to thousands of employers across the UK, helping them to overcome a full spectrum of employee relations issues quickly and compliantly.

From day-to-day queries regarding sickness absence and performance concerns, to complex issues such as TUPE, discrimination and medical capability, your dedicated adviser will help you to make light work of your people problems, guiding you every step of the way through to your preferred outcome.

To discuss your specific situation and find out what’s included in our unlimited, fixed-fee service, call 0345 226 8393 or request your free consultation using the button below.

Get your FREE consultation

Events for employers

Be part of our upcoming in-person events, where industry experts share practical guidance, legal updates, and actionable insights to support your organisation. Network, learn, and stay ahead.

Find an event near you

Sign up to our monthly newsletter

Receive the latest employer news, including employment law updates, expert articles, free resources and event invitations – all delivered directly to your inbox.  

Our services

Employment Law & HR

Health & Safety

Client Log-in

Refer a friend

Company

About us

Resources

Gender Pay Gap

I need help with

Careers

Contact us

0345 226 8393

enquiries@worknest.com

Head Office

Woodhouse, Church Lane, Aldford
Chester CH3 6JD

View on map

View our locations
Facebook Twitter Linkedin
Click here to start chatting 
Chatbot Avatar Not sure what you need? ×
wn-l-wh

Nest AI beta

  Click here at any time to speak to an expert.

Powered by WorkNest.
For information see our AI privacy notice .

Facebook Linkedin Youtube

© 2025 WorkNest   Complaints   Privacy notice  Cookie notice  Artificial intelligence notice  Terms & conditions