The Grand National is an event that attracts casual horse racing fans and even people who never watch the sport at all will be placing bets today.
Those who do not follow racing throughout the year may be surprised to see the name of a very famous horse missing from the runners' list at Aintree today, Tiger Roll.
The 2018 and 2019 winner, owned by Ryanair boss Michael O'Leary, ran his last race at Cheltenham this year, before retiring. It means Tiger Roll will not get a chance to emulate Red Rum as a three-time Grand National winner.