[Stooky Bill]

So which regions are actually produced AND broadcast in HD?

Presumably there's a fair few that'll now have HD cameras, even HD galleries, but somewhere down the chain there's an SD bottleneck needing upgraded?

If they've an HD gallery and studio then they'll have an HD video router and an HD production work flow, then there's nothing else stopping it's programme from going to air in full HD. 

All the lines from the regions to the areas that handles distribution have been HD capable for a good few years.