stages to win by seven lengths from Grey Gold. On 11 March, Sire de Grugy attempted to repeat his 2014 success in the Queen Mother Champion Stakes in which he was opposed by two previous winners of the race in Sprinter Sacre and Sizing Europe. After being restrained in the early stages he began to make progress four fences from the finish but was never able to reach the leaders and finished fourth behind Dodging Bullets, Somersby and Special Tiara. He was moved up in distance for the Melling Chase at Aintree but fell at the sixth fence. 2015/2016 National Hunt season Sire de Grugy made a disappointing seasonal debut in the Grade 2 Haldon Gold Cup where after a bad error at the fourth fence he failed to keep up with the leaders and was eased in the home straight to finish last of the five runners, but returned to winning ways in his next start on 5 December regaining the Grade 1 Tingle Creek Chase by three parts of a length from Special Tiara with which he had a mid-air interference at the last fence forcing the race to go through a stewards inquiry but the winning result stood with his jockey Jamie Moore reporting: "He always jumps left, he's jumped a bit left again at the last". Just three weeks later he had another outing, on 27 December, in the Grade 2 Desert Orchid Chase which he had previously won in 2013. He encountered four rivals and started second favourite. After closely tracking the leader Somersby, he took control at the 7th fence but made a costly mistake at the final obstacle at which he surrendered the lead and just failed by three-parts of a length at the line, finishing second to Sprinter Sacre. A month later he again started second favourite in the betting, this time in the Grade 1 Clarence House Chase which he won in 2014. He was racing against the up-and-coming Un de Sceaux who was sent as a very short odds favourite at thanks to his unbeaten record at the time in all of his completed starts. Sire de Grugy chased him for the entire race but after looking like a threat at the second-last fence he failed to make any impressions and finished tired, five lengths away in second spot with his stablemate Traffic Fluide just a short head in third.