LONDON–(BUSINESS WIRE)–A.M. Best has affirmed the Financial Strength Rating of A (Excellent) and the Long-Term Issuer Credit Rating of “a+” of Lloyd’s Syndicate 3000 (United Kingdom). The outlook of these Credit Ratings (ratings) remains stable. Markel Corporation (Markel) is the ultimate parent company of Lloyd’s Syndicate 3000’s managing agent, Markel Syndicate Management Ltd., and of its capital provider, Markel Capital Limited. Along with Markel International Insurance Company Limited (MI