We could run the numbers, as they say. What they will tell us is that Aidan O'Brien has dominated racing both in his home country of Ireland and its nearest neighbour, where he will this Saturday be inducted into the QIPCO British Horseracing Hall of Fame. It doesn't end there, of course. He is known and revered around the world, his tally of 419 Group or Grade 1 winners (including National Hunt) having also been chalked up in America, Australia, Canada, Dubai, France, Hong Kong and Italy. No other trainer...