[DTV]

I mean, let’s be honest: a) it’s catering for a different audience albeit retaining some content that is just universally applicable and then b) BBC Scotland is about establishing a foothold in Scotland as a national broadcaster at a time when it’s never seemed more realistic to assume that it will be a separate country at some point.

Yes, it is amazing how little commentary on BBC Scotland ignores the twin crucial facts that a) its existence is largely political and b) the current BBC One Scotland + BBC Scotland arrangement has a budget roughly identical to the previous BBC One Scotland + BBC Two Scotland arrangement. It's almost entirely a signal saying 'we can serve Scotland perfectly well, please don't ditch us on independence (and slash our licence income by nearly 10%)'.

I wonder how the 21:30 news will work for Scotland? Will BBC News produce two national bulletins? One then & another at 22:10 for everywhere else?

I don't think this would be wholly unheard of. It's certainly not the norm, but there have often been a few weekends a year when Scotland has taken a second version of a weekend bulletin due to different schedules.