What actually is the justification of forcing zoos to close but keeping stately homes and the like open? Is there even one at all?
The stately "homes" are closed; the grounds are allowed to open, as I understand it.
I assume the logic is that even if you close all enclosed or partially enclosed areas in zoos (and that would involve closing off large chunks of some zoos) people would still congregate. People would gather round visible giraffes (e.g.) at Chester* in a way they wouldn't around a tree or feature at a National Trust property.