AP McCoy, who was Champion Jockey a record 20 consecutive times, knows JP McManus better than most. He rode countless winners for the Limerick billionaire and, after his retirement, has advised McManus on his racing interests.  When asked about McManus a number of years ago, he received some advice he once received from the Limerick-born, Swiss-based billionaire: “Imagine all the fish who’d still be alive if they’d learned to keep their mouth shut.” And McManus, for all his wealth, for all his success, for all his charitable largess, has tended to keep his mouth shut. The silence merely adds to…