[James2001]

I can't speak for the zooming issue, but my confidence with Network is such that I'd be inclined to believe that source material was all they could get ITV to give them - perhaps even all that exists in their archive?

Definitely not the case with at least some of the 80s Corrie episodes, as ITV3 showed the uncut versions of all the 1986-89 episodes that Network released in Granada Plus form.