Isn’t the state of emergency about powers to require someone to stay in their house / ‘castle’? What rules has the state declared over what one can do in their

Isn’t the state of emergency about powers to require someone to stay in their house / ‘castle’? What rules has the state declared over what one can do in their castle? The rules appear to be specifically about when, why and what you can do when “leaving” your castle. Which has always been the case.