LONDON, Nov 23: A World War Two code found strapped to the leg of a dead pigeon stuck in a chimney for the last 70 years may never be broken, a British intelligence agency said on Friday. The bird was found by a man in Surrey, southern England while he was cleaning out a disused fireplace at his home earlier this month.

The message, a series of 27 groups of five letters each, was inside a red canister attached to the pigeon's leg bone and has stumped code-breakers from Government Communications Headquarters (GCHQ), Britain's main electronic intelligence-gathering agency.“Without access to the relevant codebooks and details of any additional encryption used, it will remain impossible to decrypt,” a GCHQ spokesman said.

The message is consistent with the use of code books to translate messages which were then encrypted, according to GCHQ, one of Britain's three intelligence agencies.

However without knowing who the sender, “Sjt W Stot”, is or the intended destination, given as “X02”, it is extremely difficult to decipher the code, GCHQ said.—Reuters