He's not allowed to ride because he missed Leicester because of illness. The other week he rode for the Witches, then missed a Danish match due to illness, then rode for Poole on the Wednesday. Danish teams have squads so replaced him, and because he didn't miss a Prem or Champ meeting he could keep riding here.
The big worry has to be: is he actually unwell or, even more worryingly, is he picking and choosing for some reason?