What are the possible consequences where an employer fails to respond to an employee's notification of her intended maternity leave?

An employer must respond to an employee's notification of her intended maternity leave within 28 days, informing the employee of the date on which her additional maternity leave will end. The consequences of a failure to respond will be that the employer cannot prevent the employee from returning at an earlier date or withhold her pay if she returns early, nor can it discipline or dismiss her if she does not return at the end of her 52 weeks' maternity leave.