The semi-waterproof thing: I found the Neo took several days to dry out after a very soggy run. In this time the shoe picked up a bit of a pong so I then had to put them in the washing machine. I obviously didn't then want to leave them for several days to dry again, only to acquire the pong again so tumble dried them - something I'd prefer not to have to do.
Having just had breakfast with the French ambassador the winner is...
Marmite. He said something like zut alours, eef onli wi had nown all sis time, yum yum yum.
He said that it was time to go up market from jam & that the Marmite one was so good that he did not even need to try the others for some reason. He went on to say that he thanks you all for your input and will keep an eye on the forum for even more great ideas any day now.