Some of the recruits on board so far will join him and his band at a warm-up gig to raise awareness of the challenge at the Union Chapel in Islington on Friday.
Does Mr Simon really not realise that we understand perfectly well that he probably spent time thinking about how he could use a dog as a prop to make us more inclined to warm to his views, and end up laughing at him as a result?
Johnson mooches around the warm-up area - stretching those vast calves that pounded him around the running tracks of Europe and Asia for cash and records.
Frank Harper, a Kansas rancher from Sedgwick and the immediate past president of the Kansas Livestock Association, said the storm caused more work for him because he had to bring his calves inside to warm them up.