The link on the BAA Home webpage which leads to Publications – Journal still shows the August issue as being the most recent.
The October 2019 issue is in Downloads – Journal Archive. I guess this is because the PDF of the current Journal is intentionally only available to Members, although it’s usually located in Publications – Journal where the contents are restricted for non-Members.
I haven’t located the 2020 Handbook yet. I’m sure it will turn up in due course.