The Panopticon/The "Featuring" section on Audio Range tables

Hello, everyone.

I'm new here in the sense that I've just created an account, but have been on the wiki for a long time as I watched through the classic series and listened through all the Big Finish audios (through 2016, at least). Now that I'm finishing those up, I thought I'd start helping out here.

One thing that has been bothering me for a while is that there does not seem to be a great deal of consistency to who get listed in the "Featuring" column of tables on audio range pages. Some recurring characters are listed, but some aren't. On the Jago & Litefoot page, Queen Victoria is listed for one of her appearances, but not the other.

I've been doing some searching, and I have not been able to find any indication that there is a clear policy on this. Is there something that I haven't found?