This book will appeal to aviation engineers, air traffic controllers and all pilots who have taken a U.K. commercial pilots license. It explains how the U.K. Civil Aviation Flying Unit (CAFU) was formed during WWII and the work for which it was intended. How Flight Inspection methods were evolved to meet increasing challenges of improving navigational and landing aids and to ensure suitable flying standards were set for the issue of newly created licence requirements. It details the aircraft provided, their role; the seemingly ever changing Ministries from MCA to the CAA . It plots the beginning and the end of CAFU, asking how and why this occurred; tracks the changes of Ministries, policies, airfields, aircraft, inadequate housing, staff levels and pay, of aircrew and engineers who gave themselves to the safety of aviation, ensuring that to-days commercial aircraft are able to land in zero visibility conditions safely. It is a post-war history of the United Kingdoms effort, to be at the forefront of international aviation safety that is enjoyed by all who fly today. Whether you are a passenger or pilot, CAFU was a small part of this process and one to be proud of.