Part 29 of a series reassessing the documentary record behind the 1933 Magenta narrative. TL;DR: Britain resumed sustained UFO monitoring after the 1952 wave. Technical intelligence and the public correspondence desk had different functions. Classified reporting, publication controls, unresolved observations, and destruction of records are documented. Physical objects were examined in the 1967 student hoax. Project Condign explored useful technologies but reported no unknown-origin artifacts...