ITV Regional News very rarely contains adverts.
Well then those that are viewing the HD channel that does not coordinate to their main region.
They sell ads in layers with the main variation being macro-regional, then regional, then sub-regional.
All of the macro-regions (eg South, where Meridian shows in the Anglia region) are on DTT
HD. D-SAT HD actually has more participants (eg Anglia and Meridian show separately). I wonder if ITV has taken the view that at is enough for now that regional level HD appears in Sky households (because these are deemed more attractive for advertisers) and that DTT can wait.
Its interesting that the Anglia region on D-SAT is the Norwich version rather than the Cambridge one. The western side (Cambridge and MK) of the Anglia region is more populous and wealthier than the eastern side (Norwich and Ipswich). Sub-regional advertising seems limited to national/regional brands that mention specific stores, or train operating companies that only serve a particular sub-region. Abellio advertise on Anglia-East, but apart from a slow CBG to LST service have no significance whatever in Anglia-West. I wonder if the HD region is actually sold separately to the two sub-regions?