Options for an employer arranging cover for an employee on long-term sickness absence include using agency workers or arranging for the workload to be covered by the employee's colleagues.
The most appropriate course of action will depend on factors such as whether or not the likely length of the absence can be predicted and the type of work involved.
The employer should bear in mind that further flexible cover may be required, for example if a phased return to work is necessary for the employee.