Is it poss to access terrestial TV live - via the web with no aerial or Sat Dish?
Only via cable, such as Virgin.
Youview requires an aerial as it utilises freeview as a base for terrestrial TV.
It is possible to view the live content on the major providers' catch up players via their respective websites and/or apps and also via some third-party providers. But only the BBC iPlayer supports this on YouView, which is the platform used by TalkTalk TV.