Adayar is now 5/2 joint-favourite for the Arc after it was confirmed that William Buick will be riding the Derby and King George winner at Longchamp. Tarnawa is also 5/2 after finishing a close second in the Irish Champion Stakes a week ago and is continuing to be backed as Europe’s middle-distance championship draws closer. Snowfall is 5/1 after a disappointing display in the Prix Vermeille at Longchamp, where she was sent off 1/5 favourite but could only come second to Teona, who is now a 16/1 shot. Prix de l’Arc de Triomphe 2021 latest news and analysis The 2021 Arc is shaping up to be a fantastic…