We should try to keep a consistent filename for the logos.
It may also help to designate some as "always current" ?  Meaning: they could be overwritten with a new logo in the future if it is supposed to change globally.


Suggested naming examples:
guardian-corporate-blue-50x150.png
guardian-glass-white-80x220.jpg

and maybe in a new folder...?

current/guardian-corporate-black-50x150.png

We can add a note somewhere that says:
Logos in this folder will always be up to date with the current approved Guardian logo.
This means the file could be overwritten, although we will always try to maintain the colors / size / aspect ratio when possible, to prevent breaking any sites using it.