Skip to main content

Insight article

May 31, 2017

What is a SOSR dismissal?

“Some other substantial reason”

There are five potentially fair reasons for the dismissal of any employee under the Employment Rights Act 1996 (ERA 1996):

  1. Conduct
  2. Capability
  3. Redundancy
  4. Breach of a statutory restriction
  5. Some other substantial reason of a kind to justify the dismissal (SOSR)

SOSR is a residual “catch-all” potentially fair reason for dismissal. Whilst there is no statutory definition of the term or any statutory guidance, case law has made it clear that the reason must be substantial.

Interpretation of what is substantial is subjective and will depend on the facts and the type of case. The reason must also be of a kind which will justify the dismissal (rather than any lesser sanction) of an employee holding the job the employee actually held.

Common examples of scenarios that may constitute an SOSR dismissal

Protection from competition

Where an employee acts in a way that falls short of a breach of duty or is in a situation that creates a potential conflict with the employer’s interests, the employer may be able to dismiss the employee by relying on SOSR.

The most common types of cases in this category relate to conflict of interest or restrictive covenants.

Cases involving conflicts of interest

To be able to succeed in relying on the risk of competition as being SOSR, the employer must be able to provide evidence to substantiate its perception that the employee poses a risk to its business interests. The evidence will be as to the nature of the information to which the employee has access.

If an employee has limited access to commercial information, an employer will struggle to show that it was concerned about a risk at all. It is also usually necessary to show that the employee has close connections to a competitor (or an employee of a competitor) and that the employer fears the employee may leak confidential information.

To establish an SOSR dismissal, in these circumstances, the employer must show that continuing to employ the employee would give rise to a real commercial risk.

Cases involving restrictive covenants

The scope of any restrictive covenant will have a bearing on whether an employer can rely on it for an SOSR dismissal. Case law has established dismissal following a refusal to enter new restrictive covenants, which was found to be for SOSR and potentially fair.

Personality clashes

Personality clashes or irreconcilable differences between colleagues can amount to SOSR. However, the conflict would have to cause a substantial disruption to the business.

Other examples

  • The non-renewal of the fixed-term contract of an employee recruited as maternity leave cover.
  • The dismissal of an employee for a theft conviction unconnected with his employment.
  • The dismissal and re-engagement of an employee to impose new contractual terms and conditions that the employee has refused to agree to.

The two-stage test for any dismissal will apply notwithstanding the potentially fair reason for the dismissal.

Having identified circumstances giving rise to an SOSR dismissal, the employer must ensure that it follows a fair procedure and acts reasonably in dismissing the employee for that reason, taking into account all the circumstances.

Confused about SOSR dismissals? Call employment partner Karen Cole today to clarify the position.

Note: This article is not legal advice; it provides information of general interest about current legal issues.

Stay in touch

Subscribe to our newsletter

Stay in touch

By completing your details and submitting this form you confirm you are happy for us to send you marketing communications and that you agree to our Website Privacy Policy and Legal Notice and to us using Mailchimp to process your data.


Sending

News/Insight

  • Double jeopardy of digital asset inheritance planning amid probate delays
    Hidden digital assets and mounting interest on inheritance tax bills are creating a costly double risk for families dealing with estates following the death of a loved one, as probate delays continue to impact thousands across England and Wales, addi


    Read more
  • Deal or no deal? Keeping negotiations on track
    How to keep commercial deals on track with Heads of Terms, NDAs and exclusivity, improving efficiency, reducing risk and avoiding delays.


    Read more
  • Rights and wrongs: How AI is reshaping Employment Tribunal claims
    AI may be a familiar presence in the workplace, but it’s now starting to appear somewhere less expected: the Employment Tribunal (ET). Grayson Stuckey explores this trend – and what it means for employers.


    Read more
  • Renters’ Rights Act: why process and paperwork matter more than ever for landlords
    The Renters’ Rights Act has now passed into law, marking one of the most significant shifts in the private rented sector in a generation. Most of the new measures will take effect in May 2026, with a national landlord database to follow later in th


    Read more
  • Understanding the Roles of Executors and Trustees
    When making a will, you place significant trust in those appointed to carry out your wishes. Executors and trustees are key roles, often held by the same people, but their responsibilities differ. Understanding these roles and their obligations helps


    Read more

What they say...

  • Paul Woodman, March 2026
    Will writing “Excellent service from start to finish. Efficient and good value. Charlotte was very professional, knowledgeable and understanding.”

  • Client, March 2026
    Great Service “Contacted RIAA to update my will and other things. Charlotte and James provided an efficient, friendly service, and the process was dealt with quickly. Much appreciated.”

  • Client, March 2026
    Expert knowledge and support “Pippa was invaluable in her insight, knowledge, and support. Through what is a very difficult time, she gave me hope that there is something to be done. Very solutions-oriented!”

  • Eve, March 2026
    Professional, compassionate and seamless legal support “I would like to express my sincere gratitude to Charlotte, Solicitor at RIAA Barker Gillette (UK) LLP, for the outstanding support she provided to my father during the creation of his will

  • Laura Kelly, February 2026
    Review of legal guidance received “I recently worked with Patrick Simpson on my settlement agreement. Patrick guided me through every stage with exceptional care and diligence. He kept the process moving efficiently, always updating me promptly

Read more
Send this to a friend