https://g.grantthornton.co.uk/insights/stress-testing-models-face-greater-scrutiny-under-ss123/ Grant Thornton UK en 2026-08-06 Stress-testing models face greater scrutiny under SS1/23 https://g.grantthornton.co.uk/insights/concentration-risk-in-insurance-extends-beyond-critical-third-parties/ Grant Thornton UK en 2026-08-06 Concentration risk in insurance extends beyond critical third parties