Link is to BBC article. Direct link to puzzle PDF is https://www.gchq.gov.uk/files/GCHQ%20Christmas%20Challenge%202024.pdf https://www.gchq.gov.uk/files/GCHQ%20

Link is to BBC article. Direct link to puzzle PDF is https://www.gchq.gov.uk/files/GCHQ%20Christmas%20Challenge%202024.pdf https://www.gchq.gov.uk/files/GCHQ%20Christmas%20Challenge%2...