After a break of three months Armiger returned in the Group Two Great Voltigeur Stakes at York Racecourse on 17 August. He was made the odds-on favourite but never looked likely to win and was eased down by Eddery in the closing stages to finish seventh of the nine runners behind Bob's Return. On 11 September Armiger started 4/1 second favourite behind Bob's Return in a nine-runner field for the St Leger Stakes over fourteen and a half furlongs at Doncaster. After leading from the start he was overtaken by Bob's Return three furlongs from the finish but stayed on to hold second place, three and a half lengths behind the winner and a length and a half in front of his stable companion Edbaysaan. Armiger ended his racing career on 3 October in the Prix de l'Arc de Triomphe. Ridden by Willie Carson, as Eddery opted to ride Khalid Abdullah's Irish Oaks winner Wemyss Bight, he finished fifteenth of the twenty-three runners, thirteen and a half lengths behind the winner Urban Sea.
