(1) The times at which annual leave is granted to an employee shall be determined by his or her employer having regard to work requirements and subject -

(a) to the employer taking into account -

(i) the need for the employee to reconcile work and any family responsibilities,

(ii) the opportunities for rest and recreation available to the employee,

(b) to the employer having consulted the employee or the trade union (if any) of which he or she is a member, not later than 1 month before the day on which the annual leave or, as the case may be, the portion thereof concerned is due to commence, and

(c) to the leave being granted -

(i) within the leave year to which it relates,

(ii) with the consent of the employee, within the period of 6 months after the end of that leave year, or

(iii) where the employee -