In Black Mirror S04E06 Black Museum, we got mention of so many previous episodes that it seems like it is clearly suggesting that it exists in the same universe. It mentions cookies from White Christmas and cloud storage from USS Callister. Even Tommy's lollipop made an appearance, suggesting it takes place after that episode; it also mentions that cookies are old technology.
Is this a deliberate attempt to address fan theories about the whole show existing in the same universe, or just more extended Easter eggs? This episode does set a bit of chronology. Did any of the official persons address it?