Start with the job pack before you write
Public-sector adverts often give you more information than a private-sector advert. You may have a job description, person specification, essential criteria, desirable criteria, values statement, competency framework, and sometimes a separate supporting statement prompt.
Read those documents before you choose your examples. Mark the criteria that are repeated or weighted heavily. Then decide which CV section will prove each one. Your CV should not copy the person specification line by line, but it should make the same evidence visible.
For example, if the person specification asks for experience handling confidential information, the CV should show the context, sensitivity, action, and result. A stronger bullet might say: “Maintained accurate case records for a housing support team, protecting confidential client information while reducing weekly document chasing by introducing a clearer tracking log.”