That's an odd thing. The only regional, or distance related, restriction is the 2km one, and that relates to exercise only. All other lawful reasons for leaving your home are distance independent. You may, for instance, go to the supermarket down the road from you. You may equally go to a supermarket 200km away, if that is the purpose of your journey.
Now, I'm not saying that's wise, or responsible, or a good thing to do. But it is lawful.
Most commentary on the media completely ignores the difference between mandatory and advisory. Personally, I'm far more likely to do something if I'm asked nicely. If I'm ordered to do so, in an arbitrary manner, I'll start looking for the loopholes. But maybe that's just me!