Can an existing safety case report be improved rather than rewritten?

Yes. An existing building safety case report does not necessarily need to be rewritten from scratch if the underlying information and risk assessment remain sound.

The first step should be to understand where the existing safety case is strong and where there are gaps. This might include unclear or unsupported safety arguments, missing evidence, insufficient consideration of foreseeable hazards, weak links between identified risks and controls or a lack of evidence that important controls are actually effective.

In many cases, the existing report can provide a useful starting point. The priority should be to improve the underlying safety case rather than simply rewriting the document.

This may involve carrying out further risk assessment, obtaining missing evidence, reviewing the effectiveness of controls, addressing known deficiencies or restructuring parts of the report so that the safety argument is clearer.

Where a report has received feedback or an RFI from the Building Safety Regulator, that feedback should also be considered alongside the wider safety case. The aim should not simply be to answer individual questions, but to understand whether they indicate a more fundamental weakness in the way the building safety risks have been assessed or demonstrated.