Hi Maebh,
the rules regarding thesis formatting and binding are very strict. So, if for example you need to include an A3 page, you should have asked written permission months in advance.
I assume that the same applies for all non-standard features you want to include. I very much doubt you are allowed to included loose pages. Check with the registration office in your school.
PS If it is necessary to include audio or visual material, you can include a cd in a plastic pouch attached on the front page.