Fair enough - Sussex or the south of England, my point still stands; if you're going to have different restrictions for different areas, you ultimately have to prevent travel between them.
I am puzzled by one part of Johnson's message though. He said this was different from the first lockdown...
Fine. Have separate rules for Sussex then, as Covid isn't as much of a problem as it is in other places. Of course, if you do that, logically Sussex would have to to self isolate from the rest of the country (or the rest of the country would have to isolate from Sussex, if you prefer) - you...