...the image is composed from two scrolled screens... because the list was longer than a screen.
I was getting errors when apps were trying to update, so I presume wherever it normally installs apps was full. I couldn't find any way through System Settings to see anything other than the Internal and External SD though, both of which had plenty of space, so where does it store them and how do we check it (without using Link2SD or some other app)?
Anyway, I've installed Link2Int now and moved all apps to the SD and now it shows
Internal: Used 274MB Free: 482MB (is this where the apps were stored before I moved them)?
SD Card (/mnt/sdcard) Used 12.44GB, Free 2.18GB (this is my external SD card)
Ext. SD (/mnt/sdcard2) Used 533MB, Free 1.53GB (I assume this is the internal SD, so it's a bit confusing having it labelled Ext!)
SD Card 2nd Part (/data/sdext2) Used 533MB, Free 1.53GB (this is obviously a copy of Ext.SD)
System (/system): Used 328MB, Free 50MB (what is this, as it's very low on free space)?
Cache (/cache): Used 4.14MB, Free 185MB