The Nightingale's flop explained The Nightingale was found to be suffering from a fibrillating heart following his below-par run in the William Hill King George VI Chase at Kempton. Paul Nicholls' charge was the subject of sustained ante-post support for the race but after mistakes at the eighth and tenth fences, was pulled up by Sam Thomas before the third last. Writing in his exclusive column at www.betfair.com/paulnicholls, the champion trainer said: "We fancied The Nightingale to run well but he may have found 3m too far. "I can reveal exclusively here that he finished distressed and we have discovered that he has a fibrillating heart, similar to the problem that Denman suffered from."