NSA/CSS @NSAGov
Our partner's across the pond have another challenge for you today. Try it out and wake up your brain with this week's #GCHQPuzzle! — PolitiTweet.org
GCHQ @GCHQ
Monday mornings don't have to be so bleak... Especially when you've got a new #GCHQPuzzle to kick off the week ⬇️… https://t.co/fQltAWUFmE