- GCHQ’s Christmas puzzle contains hidden clues for first time – can you crack the codes? The Telegraph
- Can you solve the GCHQ Christmas challenge? BBC
- GCHQ intelligence agency reveals Christmas puzzle – containing hidden clues for an extra challenge Sky News
- Can YOU solve GCHQ’s annual fiendish Christmas puzzle? Daily Mail
- Can you solve GCHQ’s Christmas puzzle? Put your brain to the test against Britain’s top spies LBC
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