Executive Summary
The purpose of this ‘Data Journey’ is to support regulated firms in understanding, evidencing, and governing the use of physical climate hazard data within the expectations set out in PRA SS5/25. It is intended to provide a clear explanatory bridge between data design choices, regulatory workflows (including asset identification, materiality assessment, and scenario analysis), and the practical use of hazard insight to inform proportionate management action.
This document does not prescribe modelling approaches, replace firm-owned judgement, or introduce new risk methodologies. Rather, it is designed to improve explainability, transparency, and consistency in how hazard-led data is interpreted and used alongside existing risk management frameworks.
The ‘Data Journey’ is a supplementary narrative that connects (i) the technical construction of hazard data, (ii) the practical steps firms must undertake under PRA SS5/25, and (iii) how hazard insight can be translated into proportionate management action and increased portfolio resilience.
It is not designed to be read linearly by all readers. Instead, it functions as a reference ‘journey map’ that different stakeholders can dip into depending on their role.
