Westy
You need to make sure each page has your full name, date of birth and National Insurance Number. If you have not already printed them, then you can add a header to each page, if you have, then I am afraid you will have to write it.
Also make sure that each page is numbered, we suggest "page x of y" as this it makes it easier to identify pages are missing.
If you cannot staple them then punch a single hole in the top left corner and use a treasury tag to keep them all together, failing that use a piece of string.
You should be able to stick the supplied envelope on the front, if it is the same size envelope (just deeper), then you should only pay the difference between the Freepost and the postage method you choose, if it is a larger envelope entirely then you may have to pay the full price.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
