A night worker is an employee who is scheduled to work at least three hours of his/her daily working time during night time on the majority of days on which he/she is scheduled to work. Night time is defined as the period between 11 pm and 6 am.
Employers must offer employees a free health assessment before they become a night worker. Employees do not have to accept undertaking this medical, but all information relating to this must be kept in writing.
This assessment is recommended annually or more often if needed.
The assessment can take the form of a simple questionnaire that is then assessed by a qualified practitioner but further tests and/ or repeated assessments may be necessary.