Is medical evidence usually relied on in a disability discrimination case?

Medical evidence often plays a key role in determining whether or not an employee or job applicant has a disability. Employment tribunals can consider the medical evidence available, which can address questions on, for example, the nature of the employee's condition or illness; the effect it has on his or her ability to carry out day-to-day activities; and how long it is expected to last. However, whether or not an individual has a disability is a legal issue that can be determined only by the employment tribunal.