GCHQ's annual brainteaser comes in the form of the agency's Christmas card, sent by the intelligence organisation's director Anne Keast-Butler. This year's puzzle challenges the public to decode the names of UK landmarks, testing skills like codebreaking ...

GCHQ’s Christmas puzzle contains hidden clues as an extra challenge for sleuths for the first time. The intelligence security and cyber agency’s annual yuletide puzzle, which aims to test intuitive reasoning and creativity, advises puzzlers to work in groups to best tackle the brain teasers.

This year’s Christmas card from the UK spy agency features a map of the UK and Northern Ireland, reflecting a geography-inspired theme, and includes seven puzzles designed to test skills such as codebreaking, mathematics, and analytical thinking - mirroring the problem-solving approach used at GCHQ.

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access information on a device and to provide personalised ads and content, ad and content measurement, audience insights and product development. List of Partners (vendors)

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access information on a device and to provide personalised ads and content, ad and content measurement, audience insights and product development. List of Partners (vendors)

Challenge includes puzzles meant to engage young people in complex problem-solving. The aim is to inspire interest in STEM subjects and potential careers in cybersecurity. The initiative encourages teamwork and appeals to a range of intellectual skills,

Every year, the government’s secret communication service sets a festive puzzle for the British public to set their minds to and decipher. Whether you’re looking to test yourself or inspire a budding young mind to pursue a tricky career in cybersecurity or intelligence in the future,