GCHQ Christmas Challenge

The card design includes a nod to our wartime home at Bletchley Park with a rare image of the snow-covered mansion. It was taken in January 1940, before a photography ban was introduced there, and was discovered in the personal family album of codebreaker Joan Wingfield.

There are seven complex puzzles, masterminded by our in-house puzzlers, designed to test a range of problem-solving skills and encourage the use of teamwork to reveal the final festive message.