Yes, the United Kingdom is a founding and highly influential member of the International Civil Aviation Organization (ICAO), which is a specialized agency of the United Nations. The UK was one of the original signatories of the Convention on International Civil Aviation, commonly known as the Chicago Convention, in 1944. As a member state, the UK works closely with other nations to develop international Standards and Recommended Practices (SARPs) that ensure global aviation safety, security, efficiency, and environmental protection. In 2026, the UK continues to maintain a permanent mission to ICAO in Montreal, Canada, providing technical expertise through the Civil Aviation Authority (CAA). This membership is vital for the UK as it allows British-registered aircraft to operate internationally under a standardized legal framework. Furthermore, the UK often serves on the ICAO Council, the governing body that adopts the SARPs, ensuring that British aviation interests and safety innovations help shape the future of the global aerospace industry, including modern regulations for sustainable aviation fuels and advanced air mobility.