I noted in the Astra/Zafira FAQ section under Astra Mk5 thread that there is a link provided to download Owner's Manuals. I tried the link but unfortunately it is expired.
I did however find on the Vauxhall site the correct link , which is:
I wanted to post a reply directly under the original thread but I am not allowed to (by my lowly membership I guess) so I have posted it here. Hope this is OK?