Grand National in a nutshellpublished at 13:58 British Summer Time 9 April 2022
Frank Keogh
BBC Sport at Aintree
How long does it last? The winner usually completes the course in about nine minutes. There are 30 jumps, including Becher's Brook and The Chair, over a distance of four and a quarter miles.
What does the winner get? The total prize fund is £1m with the winning team collecting £500,000.
Why are there different weights? It is a handicap steeplechase with runners allocated weights according to their ratings.
How many Grand Nationals have there been? This is the 174th running of the race.
What about safety? Significant changes were introduced before the 2013 race which saw the core of fences softened, the distance reduced and new procedures for loose horses. There was one equine fatality in the race last year - the second from a total of 316 runners in the past eight editions.