Which colours will be most in evidence at the Martell Cognac Grand National meeting - and who do they belong to?
Nicknamed 'The Sundance Kid' for his fearless gambling exploits, the former Irish bookie made his fortune in the currency market.
Owner of the legendary Istabraq. His unobtrusive manner belies a big mover and shaker - his friends include Tiger Woods and Sir Alex Ferguson.
Colours stem from those of his local GAA club in Limerick.
Leading horses: Youlneverwalkalone, First Gold,
Dapper Brummie has a small but classy string of horses that many bigger owners would kill for.
Even before the arrival of dual Cheltenham Gold Cup winner Best Mate, Edredon Bleu's gutsy successes had endeared him to the public and earned his owner the nickname of 'Lucky Jim'.
Lewis' colours reflect his other passion - Aston Villa.
Leading horses hopes: Best Mate, Edredon Bleu, Impek.
The son of an East End docker, Johnson now runs a finance company and his string of horses forms the backbone of Martin Pipe's yard.
Champion owner last season but has yet to have a real superstar.
Leading horses: Iris Bleu, Lady Cricket
Sir Robert Ogden
Publicity-shy Yorkshire industrialist who was knighted for his services to charity.
His horses are scattered among a handful of trainers.
Leading horses: Marlborough, Ad Hoc
Began his career as a bricklayer and built up his fortune through holiday camps.
Another who spreads his horses around several trainers.
Leading horses: Chives
Macca & Growler Partnership
Better known as top footballers Steve McManaman and Robbie Fowler.
The Scouse double act have several horses with Martin Pipe, many of whom have been bought from Germany by ex-jockey Graham Bradley.
Leading horses: Seebald, Samon.