> whilst the [British] Air Ministry were happy to go along with the story [of carrot-improved vision], they never set out to use it to fool the Germans.
> The German intelligence service were well aware of our ground-based radar installation and would not be surprised by the existence of radar in aircraft. In fact, the RAF were able to confirm the existence of German airborne radar simply by fitting commercial radios into a bomber and flying over France listening to the various radio frequencies!
Link: https://www.scientificamerican.com/article/fact-or-fiction-c...
I wasn't however able to find if there is any reason for the british to push such a message if it wasn't to confuse the germans.
Could it have had something to do with rationing? Perhaps they were trying to increase carrot consumption.
It can also be that they wanted citizens to cultivate more of it in their home gardens for its nutritional values. But either way, I have no data to confirm it.