“Michael picked out the King George and the Arc for him earlier in the year and he’s done the first one and is on course for the second.

“The German track just didn’t suit him last time and Ryan Moore wasn’t too hard on him once his chance had gone. The horse (Kamsin) that ran second and was promoted to first has since gone on to win another Group One so the form isn’t that bad at all.”

A best-priced 25-1 for the Arc with Coral, Papal Bull has shown ability on a variety of surfaces but Stack is hoping for sound conditions at the Parisian track this weekend.

“We want goodish ground ideally but he is a good, hardy competitor and he has run well on soft ground before too,” he added. “Sir Michael is happy with him and he is an intended runner.”

Papal Bull is best-priced at 25-1 with Coral. The Alain de Royer-Dupre-trained Zarkava, who has yet to be beaten in six outings, is the 7-4 favourite.