Someone who'll be watching the Grand National very closely is Olympic sailor Sarah Ayton. The Sussex-based sportswoman only began riding four months ago. But this summer she'll be taking part in the Magnolia Cup at Glorious Goodwood. As Mary Stanley found out, despite her lack of experience, she's already impressing the experts.
The Grand National is set to run at 4.15pm at Aintree today.
Millions of people are expected to have a flutter on the 166th John Smith's Grand National today.
Forty runners and riders will compete in the world's most famous steeplechase at Aintree Racecourse.
A sell-out crowd of more than 70,000 in Liverpool will be joined in watching the contest by an estimated 600 million television viewers across the globe.
Bookies hope the betting could top £150 million with punters expected to wager more cash than usual as this year's race is the only major sporting event of the weekend.
The Grand National usually coincides with the US Masters and FA Cup semi finals.
Coral Spokesman Simon Clare said: "The Grand National is one of Britain's most popular sporting occasions, with two thirds of the adult population likely to place a bet.
"Seabass is expected to be the best backed horse in the race, as the so-called housewives' choice, given the huge media spotlight on his rider Katie Walsh who is bidding to be the first lady rider to win the Grand National."
A trainer from Sussex is hoping to win the Grand National trophy on Saturday 6th April.
Richard Rowe was part of Josh Gifford's stables, when Aldaniti romped home more than thirty ago. Now having become a successful trainer himself, he thinks that his horse - Tatenen - could scoop the big prize. Andrew Pate spoke to both the trainer, and groom - Lizzie Gorringe - in his report.
Three horses from the region are in preparation for the weekend's Grand National at Aintree.
Tatenen, whose stables are in Storrington in Sussex journeys for the racecourse later today to take part in the steeplechase. Berkshire-based horses Soll, and the Nicky Henderson trained - Roberto Goldback - will also feature in the horse racing event.