Fire risk assessments should be regularly reviewed to ensure they are being followed to mitigate or remove any risk from fire. Fire Risk Assessments should especially be reviewed in the event of any changes to how the building is used (e.g. office restructuring/changes to storage of equipment etc) as this may need additional action to protect occupants.
The interval for a professional review will be advised by your chosen Third Party Certificated fire risk assessor. This action is noted in the BAFE SP205 Scheme Document (V5 - Annex D) as part of a comprehensive fire risk assessment.