A secret World War Two message found on the leg of a dead pigeon has left 21st century codebreakers flummoxed.
The code, hand-written on a small sheet of paper headed "Pigeon Service", was found in a small red canister attached to the bird's skeleton up a chimney at a house in Bletchingley, Surrey.
Experts from UK intelligence agency GCHQ said the message, which has 27 five-letter code groups, is impossible to crack without its codebook.
They were also left stumped by missing details, such as the date of the message and the identities of the sender, "Sjt W Stot", and the recipient, "X02".
People from around the world try to crack a World War Two message found on the leg of a dead pigeon
A secret World War Two message found on a dead carrier pigeon has left 21st Century code-breakers baffled.
The remains of a WWII carrier pigeon lost in action while delivering a secret message have been found in a chimney in Surrey.