Ed Chamberlin presents coverage of the Prix de L'Arc de Triomphe from ParisLongchamp, which features the best horses in the world over the mile and a half trip. Twelve months ago, German horse Torquator Tasso caused a huge upset and looks to retain his title. With analysis from Jason Weaver, Adele Mulrennan and Matt Chapman, reports from Rishi Persad in France and commentary from Richard Hoiles.