Not entirely sure, but I found wxgtk2 & wxgtk-common are required by woeusb-gui
Searching pamac installed for ‘wx’ these are the only 2 that show up.
After reading the other thread AUR - please restrain yourself (& being a semi-professional idiot) ; I realise this is probably my own carelessness.
I must have enabled AUR at some point to browse or acquire a certain software & then left it enabled, so I may have since inadvertently installed AUR software without noticing.
Although I was aware of the AUR risk at the time, i since forgot it was enabled.
I disabled AUR & those 8 updates went away.