Page 1 of TV broadcasts

I hope this question hasn`t been asked before, and I did take a look around (but knowing me it probably gets asked twice a week)...anyway

I`ve noticed that when some channels break for adverts, the picture seems to zoom out the way, and after reading some stuff on anamorphic and how it works...

It seems to me as if some channels (I know paramount is one) are not broadcast in normal 4:3 (hoping I get that right...) I.e. normal telly.

Does anyone know a URL where I can find out what aspect ratio TV programmes are broadcast in?

Sometimes when I`m watching TV I`ll notice that the picture looks stretched, that`s because the TV is set to full (i.e. stretching the picture out) because someone has been watching a DVD (and afaik full is the correct setting for anamorphic).

Anyway, I`m using Telewest analog cable.

Sending this up again in case someone knows the answer but missed the post.