Executive Summary
A January 2026 roundup highlighted that the Bank of England’s Prudential Regulation Authority (PRA) has strengthened climate risk expectations for UK financial firms, signalling a move from awareness to embedded, auditable risk management (Walker, 2026). The practical banking standard is that climate-related financial risk should now be treated like other core prudential risks, with clear board oversight, traceability in the risk register and risk appetite, disciplined climate scenario analysis, and defensible data governance (PRA, 2025a; PRA, 2025b). Critically, the PRA’s six‑month window is a review-and-planning milestone rather than a full implementation grace period; by early June 2026, firms are expected to complete an internal review, identify gaps, and agree a credible action plan (PRA, 2025b; PwC UK, 2025).
Why This Roundup Matters for Banking Standards
Green Central Banking’s summary captures the key supervisory shift: the PRA is tightening rules so climate considerations are embedded into core risk frameworks and board decision-making, rather than treated as a standalone ESG reporting exercise (Walker, 2026). That framing matters because it aligns climate risk work with the evidentiary standards banks already apply to governance, risk appetite, model risk management, and supervisory documentation (PwC UK, 2025).
SS5/25 Establishes A Prudential Baseline for Climate Risk
SS5/25 is the PRA’s supervisory statement setting expectations for how firms should manage climate-related risks, published on 3 December 2025, and it explicitly covers governance, risk management, climate scenario analysis, data, and disclosures (PRA, 2025a). In policy terms, PS25/25 positions the update as an evolution of the PRA’s earlier expectations, adding clarity and bringing them up to date with international developments and understanding since 2019 (PRA, 2025b).
The June 2026 Review Period Is Not An Implementation Grace Period
The roundup underscores the PRA’s message that the six-month period ending in June 2026 should not be interpreted as time to “get around to” implementation (Walker, 2026). The PRA confirms in PS25/25 that firms are expected to complete an internal review of their current status against the final policy and develop a plan to address gaps within six months of commencement, while also stating it does not expect firms to have closed all gaps within that review period (PRA, 2025b). Industry interpretations have repeated the same point: by 3 June 2026, firms should have completed the internal assessment, identified where they fall short, and agreed a credible and ambitious remediation plan (PwC UK, 2025).
Climate Risk Management Moves From Narrative to Evidence
A recurring theme in supervisory commentary is that the regulator is pushing firms from merely stating climate risk to integrating it into decision-making, controls, and governance processes (PwC UK, 2025). In the same spirit, external observers have described SS5/25 as explicitly prudential in tone, with an expectation that climate risk is managed on par with other financial risks and can influence balance-sheet and capital planning considerations (Cárdenas Semenova, 2025).
Board Oversight Becomes a Banking Standard, Not a Specialty Topic
Green Central Banking summarizes that the updated expectations require embedding climate considerations into board-level decision-making and core risk frameworks (Walker, 2026). PS25/25 also reinforces proportionality and materiality, expecting firms to scale governance attention and information provided to boards in line with the materiality of climate-related risks, rather than treating climate as universally immaterial or universally overwhelming (PRA, 2025b). In practice, supervisory and advisory commentary converge on a core standard: boards should be able to set, challenge, and oversee climate-related risk appetite, and receive decision-useful management information traceable to data and assumptions (PwC UK, 2025).
Risk Registers Become the Traceability Backbone
For banks, one of the most concrete “standards-like” expectations is that material climate-related risks must be captured in a risk register structure that supports oversight and escalation (PRA, 2025b). PS25/25 makes clear the PRA views inclusion of material climate-related risks in risk registers as central to the policy’s aims, while allowing firms to use judgment on whether risks are captured in an existing risk register or via a supplementary sub-register, as long as the firm can explain how climate-related risks are captured through its processes (PRA, 2025b). This is exactly the kind of auditable control point supervisors can test, because it creates a durable link between identified risk, risk ownership, risk appetite, monitoring, and governance actions (PwC UK, 2025).
Risk Appetite Must Be Monitorable, Not Just Stated
SS5/25 explicitly covers risk appetite as part of the supervisory expectations (PRA, 2025a). The roundup’s framing of “embedding” implies that climate risk appetite cannot remain an abstract statement; it must translate into monitorable management information, limits, and escalation pathways that operate alongside existing credit, market, liquidity, and operational risk governance (Walker, 2026; Cárdenas Semenova, 2025). PwC’s summary also stresses that boards must be able to set and oversee climate-related risk appetite and that this should be tested in the internal review and gap analysis that the PRA expects within six months (PwC UK, 2025).
Climate Scenario Analysis Becomes a Supervisory Tool
PS25/25 indicates the PRA expects climate scenario analysis and related tools to be used proportionately, clarifying that narrative-based scenarios with judgement-based quantification can be appropriate for longer-term and less likely scenarios and that firms should remain aware of the limitations of the tools they use (PRA, 2025b). PwC’s synthesis similarly highlights that the PRA expects the scale and type of climate scenario analysis to align with exposures and allows firms to choose between reverse stress testing, scenario-based sensitivity analysis, or both (PwC UK, 2025). Interpreted as a banking standard, the point is not simply that scenarios exist, but that outputs are credible, limitations are stated, and results can be shown to influence risk assessment and decision-making (PRA, 2025b; Cárdenas Semenova, 2025).
Data Governance and Proxy Discipline Become Part of Compliance
SS5/25 includes explicit expectations on data and disclosures, signalling that data and its controls are supervisory concerns rather than back-office details (PRA, 2025a). PwC notes that the PRA has refined expectations on data uncertainty and proxy use, emphasizing understanding uncertainty and selecting appropriate proxies while recognising limitations, rather than defaulting to conservative proxies in all cases (PwC UK, 2025). In banking standards terms, these points toward model-risk-style governance: data lineage, transparent assumptions, documented limitations, and reproducible runs that can be evidenced after the review period ends (PRA, 2025b; PwC UK, 2025).
Accountability Uses Existing Structures Rather Than Creating New Roles
PS25/25 clarifies that the PRA does not expect the creation of a new Senior Management Function role specifically for climate-related risks, and it amended the wording to refer to SMF holders or other senior individuals responsible for oversight (PRA, 2025b). PwC’s summary aligns with this, indicating firms can assign climate responsibilities within current governance arrangements provided they still enable effective identification and oversight (PwC UK, 2025). This is a subtle but important banking standard: the regulator is asking for integration into existing lines of accountability rather than building parallel governance.
Banking-Specific Standards Touch ICAAP, ILAAP, and Financial Reporting
PS25/25 states that banks should be able to evidence, if asked by supervisors, how climate risk materiality judgements were made in ICAAP (and similarly for liquidity adequacy), aligning climate integration with existing prudential expectations for capital and liquidity assessment (PRA, 2025b). PwC also highlights that for banks, climate scenario horizons used within ICAAP and ILAAP can be set in line with the usual timeframes for those assessments, with longer-term scenarios used for broader strategic planning (PwC UK, 2025). Read as a standard, this pulls climate risk out of the “long-dated narrative” bucket and into the governance mechanisms that shape provisioning, funding resilience, capital planning, and risk appetite (PRA, 2025b; Cárdenas Semenova, 2025).
What “Good” Looks Like By the June 2026 Milestone
By the end of the review period, the PRA expects firms to have completed an internal review against SS5/25 and developed a plan to address gaps, rather than fully closing those gaps, and PwC’s summary adds that supervisors will begin requesting evidence only after the six-month period ends (PRA, 2025b; PwC UK, 2025). Translating that into banking deliverables, banks should be able to produce a coherent evidence pack that shows the climate risk operating model, the risk register entries and owners, the risk appetite statements and monitoring metrics, the scenario analysis approach and limitations, and the data and proxy governance that underpins results (PRA, 2025a; PRA, 2025b).
Why This Is Converging Into a Banking Standard
In the roundup’s language, this is a shift to embedding climate into core frameworks and board decision-making, and PwC’s quoted assessment that this is “a step change, not a refinement” captures how supervisors are likely to judge readiness (Walker, 2026; PwC UK, 2025). When supervisory expectations become testable through documented governance, risk registers, scenario analysis, and data controls, they effectively function as a standard that can be audited, compared across firms, and challenged during supervision (PRA, 2025a; PRA, 2025b).
References
- Cárdenas Semenova, D. (2025, December 11). The PRA puts climate risk on par with financial risk. The Carbon Trust.
- Prudential Regulation Authority. (2025a, December 3). SS5/25: Enhancing banks’ and insurers’ approaches to managing climate-related risks. Bank of England.
- Prudential Regulation Authority. (2025b, December 3). PS25/25: Enhancing banks’ and insurers’ approaches to managing climate-related risks – Update to SS3/19. Bank of England.
- PwC UK. (2025, December). PRA sets new climate risk management standard for banks and insurers.
- Walker, I. (2026, January 8). Roundup: Bank of England strengthens its climate risk expectations. Green Central Banking.
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