This week, hundreds of thousands of neatly dressed, optimistic racegoers will descend on Cheltenham for the highlight of the National Hunt Calendar. For a few minutes on Friday, as Jockey and Horse tackle the 22 fences of The Gold Cup, all eyes will be on the course. But what happens in the months and even years in the lead up? The prospect of saddling a winner fuels the fire of every National Hunt trainer. Five-time champion trainer Nicky Henderson and author of The Jumping Game Henrietta Knight, trainer of Best Mate - who won three consecutive Gold Cups – reveal to Alice Plunkett what it takes to train a jumps winner.