Minella Times, trained by Henry de Bromhead, is the top weight in the race this time.
Snow Leopardess is one of the leading British contenders with her story attracting punters – a mare who returned to racing after giving birth to a foal and the first mother on record to run in the National.
Irish-trained horses dominate the top of the betting with last year’s third horse Any Second Now and fourth Burrows Saint both returning.
Delta Work and Escaria Ten are among seven runners for Gordon Elliott.
Four reserves have been named – Commodore, School Boy Hours, Romain De Senam and Roi Mage.
They can run in the race if any other horses pull out before 13:00 BST on Friday