sentence: records most successful horse since 1946 : no horse has won this race more than once since 1946 leading jockey since 1946 ( 4 wins ) : ruby walsh -- sporazene ( 2004 ) , desert quest ( 2006 ) , american trilogy ( 2009 ) , final approach ( 2011 ) leading trainer since 1946 ( 4 wins ) : paul nicholls -- sporazene ( 2004 ) , desert quest ( 2006 ) , american trilogy ( 2009 ) , lac fontana ( 2014 ) winners since 1946 weights given in stone and pound ; amateur jockeys indicated by '' mr '' , '' ms '' , '' lord '' etc. the 1947 edition was abandoned because of snow and frost .