The Aintree festival is in full swing and the Grand National is upon us once again. On Saturday, 40 jockeys will attempt to navigate the course. Grand National Pinstickers' guide to Aintree runners & riders. By Frank Rating: 6/10 Approximate odds: Rating: 7/10 Odds. With 40 horses to choose from, picking a winner on Grand National day is anything but easy. To make it easier we'll be providing you with the betting for the 40. Second to previous National winner Many Clouds over the Mildmay course at Aintree in December reads. Just don't expect all your prayers to be answered. While at times he has moments of brilliance, it's equally likely that he'll finish half way down the pack. Euro lotto tonight Cook, who will climb on board Definitly Red next Saturday at Aintree, went to see the Grand National on his first trip to the races 18 years ago. Vicente looks the pick of Grand National weights. Thirdly, Betfair always offers a free bet deal on the day of the National.