Absolute exemptions
From FOIwiki
Absolute Exemptions
Where an absolute exemption is applied to information, a public authority is not required to go on to consider the Public Interest Test in order to determine whether it is entitled to withhold the information from a requestor
The information is completely excluded from your rights of access - for example, documents prepared for court cases.
There may be cases where the authority has mistakenly applied an absolute exemption, so it is worth checking the guidance and relevant decision notices.