I've stayed away from Photoshop for this mock, I wanted to see what I could do in Illustrator for a change. I went a bit overboard with the flowers, but maybe with a bit more time I can tidy it up and it won't look too bad! It might be an idea to form some sort of image from the flowers, rather than have them randomly scattered all over the place.
Looks very impressive at the moment, I've always thought that it would look good to have the yellow objects somehow form the itv1 logo, you could say that this is what 4 and five have been doing, but maybe if its a CGI scene rather than film enhanced it may have a different appeal and feel, just an idea.
A lot of flowers on the trailer, I'd get rid of some. And I dislike the 'in high definiton', I'd just keep it as 'high definiton'. Other than that, great job.
Impressive. Are you using Illustrator CS3? I bought the Master Collection (academic) back in August. It's lightyears better than CS2 (Ilustrator crashed a lot on my machine).
It's very bright and fresh looking. I really like it.