^Do you mean the PDF that has been screenshotted into the first post?
That's still on the planning website. It's the last attachment titled "Appendix 3_ Initial Arboricultural Implications Assessment" an is on the last page of that document. It's a mid-size PDF on a slow website, so might just be taking a while to download on your end, but I just downloaded a copy.
If you still can't get it to work, let me know and I'll email it to you. I looked into any hidden layers in our PDF software, and couldn't find anything, but I don't have time to do a full look in AutoCAD or something.