Christophe Soumillon has been chosen to ride favourite Tarnawa in Sunday week’s Prix de l’Arc de Triomphe at Longchamp. Photograph:  Lo Chun Kit /Getty Images

Christophe Soumillon will ride the favourite Tarnawa in Sunday week’s Prix de l’Arc de Triomphe at Longchamp. Dermot Weld confirmed on Tuesday that C(...)