GCHQ has released it's 2024 Christmas challenge which features a series of seven puzzles - see where to download it and what to expect.
The puzzle is aimed at children aged 11-18 and is featured on a Christmas card sent by the agency's director, Anne Keast-Butler.
The brainteasers test skills such as codebreaking, maths and analysis, and require different ways of thinking.
The focus of this year's quiz is the geography of the intelligence and cyber organisation, which operates across the UK from its HQ in Cheltenham, Manchester, ...
The UK's intelligence agency has released its annual Christmas puzzle - do you have the brains to take on the challenge?
One of the UK's spy agencies has released a befuddling puzzle to put Britons through their paces.