Cracking WWII-era codes - code found on a pigeon's leg in Surrey
A problem with this message is that the image in a press release from GCHQ differs slightly from one in a New York Times article, although the paper, with its tears looks the same.

The image below shows the two side by side, the one on the left from the NY Times and the right from GCHQ. There is a slight difference in the style of writing, i.e. more sloping to the right in the GCHQ image. There are also some word differences: word 7 is GOVFN from GCHQ and FOVFN in the other.



That the message was found in Bletch***ing***ley, Surrey may be a bigger clue.