Source Currency: Issue 196, March 2026. This Issue updates the commentary to 31 December 2025, reflecting an exceptionally busy period of judicial and regulatory activity. Divisions 1-4 have been included in this Issue. Notably, we have updated the text to reflect the outcomes of the ICAO 42nd Assembly, ensuring our coverage of international civil aviation administration remains current. The UK regulatory framework continues to modernise, with this Issue addressing an extensive suite of consultations and Civil Aviation Publications (CAPs) issued by the CAA. Concurrently, we examine several key Statutory Instruments from the second half of 2025, including the Aviation Safety (Amendment) Regulations 2025 (SI 2025/1150), the Unmanned Aircraft (Amendment) Regulations 2025 (SI 2025/1106), and the Aviation Security (Amendment) (No 2) Regulations 2025 (SI 2025/1008). We also report on the ongoing regulatory treatment of Heathrow’s capacity expansion and the Gatwick Airport (Northern Runway Project) Development Consent Order 2025, alongside the continuation of injunctions against environmental protesters at major UK airports. The Montreal Convention 1999 and Regulation 261/2004 remain focal points. We analyse significant new jurisprudence from the CJEU, the English High Court, the Ontario Court of Appeal, and the Full Federal Court of Australia. Of particular note is the US Supreme Court’s decision in Fuld v PLO, which carries significant implications for personal jurisdiction in aviation-related claims.