Methodology
How GB Institutional Ratings work.
The dual-track model
The framework uses two complementary layers:
- Formal ratings (authoritative) — full five-pillar assessments updated quarterly for the 21 UK institutions and their international peers.
- Weekly Trust-Pressure Signal (provisional) — a simple directional indicator (Positive / Neutral / Negative pressure) focused on short-term Public Trust for UK institutions only. It cannot change the formal rating.
Five pillars
- Public Trust & Respect
- Performance & Effectiveness
- Financial / Operational Sustainability
- International Standing & Soft/Hard Power Contribution
- Shock Absorption & Adaptive Capacity
Rating scale
| AAA – AA– | Strong overall profile with only manageable vulnerabilities |
| A+ – A– | Adequate capacity, yet material vulnerabilities exist |
| BBB+ – BBB– | Speculative / borderline — competence or legitimacy under clear strain |
| BB+ and below | Clear impairment |
Outlook (Positive / Stable / Negative) reflects expected direction over a 2–5 year horizon.
Weekly Trust-Pressure Signal
Each week the 21 UK institutions receive a directional signal based primarily on short-term movements in Public Trust, using:
- News flow (major UK outlets + specialist coverage) classified as Clearly Positive / Negative / Mixed / Quiet
- X conversation volume and sentiment
A strict decision table and hard constraints apply (single stories alone cannot move the signal; ambiguous cases default to Neutral). The signal is explicitly non-authoritative and labelled as provisional.
Peers
Each UK institution is benchmarked against six core international peers. Peers receive formal quarterly ratings only — no weekly signals.
Limitations
Ratings are qualitative and interpretive. They prioritise long-run trends and institutional capacity over short-term politics. Modest differences between careful analysts are expected. The weekly signal reflects media and social attention and can be noisy; the formal rating remains the sole authoritative judgement.