nope, I have a site detailing exactly what you said, sky share transponders on digital.
the thing about it is this, digital channels using mpeg compression are exactly that, compressed. Try watching a football match on digital and when the pace gets fast, the screen goes blocky
dont believe everything sky and the government tell you about "digital quality"
have a look at the quality of a d2mac broadcast and compare that to the crap sky are pushing onto everyone
what I was saying about tv4, in perticular, it used to be a d2mac channel on 1'w, until tvnorge converted to digital, this left no analogue channels on 1'w. tv4 went from d2mac to analogue on a frequency that has an analogue channel on almost all satellites.
don't get me wrong, I am not against digital channels. they should just have their own transponder rather than share with up to 14 others