Signature Aviation European FBO Network North-South Divergence Intensifies: London Luton Crashes 18.4%, Milan/Madrid Grow Against the Trend Over 10%

While Signature Aviation established European 31-FBO rental car partnership with Sixt, its core European hubs show clear north-south divergence. AviGo data shows Q1 2026 five major FBO-host airports combined business jet movements at 27,768, YoY −3.1%. London Luton crashed 18.4% (5,028 → 4,105); Paris Le Bourget down 9.9% (10,943 → 9,862); but Milan Linate grew 11.1% (4,476 → 4,971); Madrid +12.6% (3,314 → 3,732); Zurich modest +4.3%. Southern/Central European counter-trend growth provides demand support for Signature's Sixt partnership, but the contraction signal from UK and France two traditional hubs cannot be ignored. Confidence ★★★ (KG + AviGo dual cross-verification).