AP McCoy jockey have ridden thousands of Causes in the Grand National on dirt . Champion jockey ultimately chose jockey for big race at Aintree . Royale stakes is worth an each - mile punt at more speculative stakes .
AP McCoy could have ridden Cause of Causes in the Grand National on Saturday . Champion jockey ultimately chose Shutthefrontdoor for big race at Aintree . Royale Knight is worth an each-way punt at more speculative odds .