Mmm, there are several things I would consider more carefully:
1) Suppose a person looks at this for <20 seconds (which is realistic). How are they going to get any idea what this poster is about, what they should do, and how they can get in on whatever you're trying to get them to do? There's soooo much text. Think about how to make the point pop out of it all.
2) Think more carefully about placement. It seems right now as if you just threw the logos on in a haphazard fashion. They don't seem to particularly belong where they are.... Consider perhaps, for instance, taking the photograph, making it much bigger, and putting it top / center. And then put the Alton Landings + splash whatever text with it, bigger than everything else. At the very least that text should be seen by your viewers, and right now it's buried. The two logos at the top could probably be minimalized at the bottom. The last logo at the bottom is also sort of too big and too randomly placed.
3) I don't exactly hate the background or the font. But I don't think they belong together. If you use that background, get a modern-looking font. Otherwise, choose a different background to go with this font. If you're going to use that font and background... I think you need to alias the text.
And, of course, I have to echo all the comments re: use a spell checker, etc, etc, etc.
Good luck!