The title "Rare Second World War Footage of Bletchley Park Emerges" isn't quite accurate. The footage is of Whaddon Hall, rather than Bletchley Park. Whaddon Ha

The title "Rare Second World War Footage of Bletchley Park Emerges" isn't quite accurate. The footage is of Whaddon Hall, rather than Bletchley Park. Whaddon Hall was MI6, whereas Bletchley Park was GCHQ (GC&CS back then). The title of the linked article uses the wording "Bletchley Park-linked" which seems more accurate!