UK law describes unfair dismissal as firing an employee without a fair reason to do so. There are five reasons for a fair dismissal:
Poor conduct.
Lack of capability or qualifications.
Redundancy.
A statutory duty or restriction that forbids employment from continuing—such as when a courier suffers a driving ban.
Some other substantial reason that explains the dismissal.
So with that in mind, the following are types of unfair dismissal:
A reason that the employment tribunal deems to be "automatically unfair".
Dismissing one of your staff without a fair dismissal procedure.
Right now, these reasons remain vague. So, we're here to give you concrete examples and help you make sure you never exercise unfair dismissal.