Horse racing news: Iroko has bookies sweating as Grand National weights announced by William Hill

The official betting partner of the Randox Grand National Festival, William Hill, have revealed that Iroko is still their biggest loser in their Grand National ante-post book.

With the weights for the world’s greatest race announced today in Liverpool’s St George’s Hall, the leading bookmakers have their biggest liability riding on the Oliver Greenall and Josh Guerriero–trained runner.