What doorbell features are only available with protect plan? (UK)

I've just bought the ring view cam. Can someone confirm what specific features only work with a protect plan? The ring website is quite generic and doesn't go to the detail of features. For example:I assume WILL work regardless of whether I pay for protect plan:* Knock detection* People only mode* Motion zones* Motion sensitivityI assume will NOT work as rely on saving images/videos in cloud:* Snapshop capture* Event historyThanks!