Commissioned by ITV from an ITV owned company. STV will have their chances though but drama is a competitive and expensive market now, and frankly looking beyond supplying the ITV network is in the interests of STV.
Ironically too given their recent purchase history I suspect ITV would be much more inclined to buy STV as a production company rather than a franchise holder.
STV Player has had an update on AppleTV, STV channels are still much better quality than ITV. The big change is that a couple of on demand Stingray Qello concerts are now available from Rick Astley and Simple Minds. Stingray Qello being one of the player's linear extra channels. SQ have loads of material, it'll be interesting to see whether this is expanded and to what extent. Both of these concerts are HQ if not HD.