How to win jumping's most famous race, by those who have scaled the summit

It is the prize everyone in jump racing dreams of winning and the list of the sport's greats who have found the race elusive shows just how hard it is to turn that dream into reality.

So, apart from a fair slice of luck, what goes into making a Grand National winner? And have the modifications to the course changed the type of horse required, the ideal preparation or the model winning ride?

We spoke to professionals with a great record in the greatest steeplechase.