I believe it’s part of the plan to prepare the public, since just announcing it (or having it leak …) would be a pretty big shock, globally, and a massive breach of protocol. To be fair, it’s pretty impossible to hide that *something* is happening/has happened. There are so many layers of people who need to be told and various things that need to be activated across Government and those parts of the Civil Service tasked with managing what will be a national period of mourning. Tbh I’m pretty impressed with how it’s being managed.