What is the procedure for postponing ordinary parental leave under the fallback provisions?

An employer may postpone a requested period of ordinary parental leave for up to six months, if the employee's absence from work during that period would cause substantial disruption or harm to its business. However, an employer has no legal right to postpone a period of ordinary parental leave that is intended to begin on the day on which the employee's child is born or placed for adoption. The employer must first discuss the situation with the employee, agree an alternative date for taking the leave, and write to the employee confirming the new arrangements. The employer's letter must be sent within seven days of the date on which the employee's initial request for leave was submitted. The new period agreed should be the same length as the period in the employee's original request.