You mustn't subject an employee to any detriment by acting (or deliberately not acting), because they took, sought to take or made use of the benefits.
Examples of detrimental treatment include denying them a promotion, facilities or training opportunities that normally would have been available to them.
You mustn't dismiss an employee or make them redundant because they took or wanted to take SPL, or made use of its benefits. You can't stop the employee returning to work after their SPL ends.
In addition, you shouldn't dismiss an employee if they took a 'keeping in touch' day, or considered taking or refusing it.
If there is a redundancy situation at the same time as an employee is taking SPL, they must be treated the same as any other employee under the circumstances. This includes being consulted about the redundancy or being considered for any other suitable job vacancies (if there are any). If there is another suitable and appropriate alternative role, it must be offered to them.
The alternative role mustn't be significantly less favourable than their current employment contract, in terms of the required capability, skill, location or the terms and conditions of employment.
See the BEIS guide 'Employers technical guide to shared parental leave and pay' (PDF) for more information.