Once a wish for flexible work has been agreed, it notes a permanent modification of the employment contract, unless otherwise agreed, and cannot be modified without further agreement between the employer and the worker. Employers and workers may agree that agreements are temporary or subject to a trial period. In certain circumstances, for example. B where a worker is caring for someone suffering from an incurable illness, the worker may wish to have only a temporary period of flexible work which the employer may take into account. Even if you can make a legal request, you may wish to make a non-legal request if, for example, the change you want is minor or temporary.. . . .