What are the possible consequences where an employer fails to confirm the end date of an employee's statutory adoption leave?

The employer must confirm the end date of an employee's additional adoption leave period within 28 days of receiving the employee's notice of intention to take adoption leave. If it fails to confirm the end date within the 28 days, the employer will not be able to prevent the employee returning to work sooner than expected from adoption leave or to discipline or dismiss him or her for failing to return to work on time.