You don’t want to plug USB sticks into a SUKEO network. Far too much hassle getting them from approved suppliers, making sure they’re not tampered with so on. Much easier to print documents and write a log of it up in a 102.
Why would a U.K. MOD CD have return to DOD written on it? Depending on where it came from it wouldn’t have any such markings. It would just be a certain colour. Note the highest document the bbc showed is on red/pink paper. Those pink CD’s are a pain to order.
GCHQ (being a British intelligence agency) has never used NOFORN as that’s an American handling caveat.
The old equivalent would be UK Eyes Alpha (UK nationals, no contractors or embeds) or it’s modern equivalent UK Eyes Only.
And no the UK rarely writes “other classification criteria” on the front of documents. Again you’re thinking of the USA. Along with double slashing // also an American thing though occasionally used this side of the pond.
