Carlton House was a present to The Queen from Sheikh Mohammed after she herself had given the ruler of Dubai a horse to run for his Godolphin operation.
The exchange of gifts worked in favour of Her Majesty as Carlton House nearly became her first Investec Derby winner, when finishing a close third behind Pour Moi in the 2011 Epsom Classic.
The colt was the ready winner of a Newbury maiden as a juvenile and earmarked himself as a potential future champion with a comfortable success on his seasonal return in the Group 2 Dante Stakes at York.
He was sent off favourite for the Derby despite an injury scare in the week leading up to the race, but endured a troubled passage under Ryan Moore and lost a shoe inside the final furlong.
Carlton House headed across the Irish Sea for the Irish Derby at the Curragh later in June but he could only take fourth behind the Aidan O’Brien-trained trio of Treasure Beach, Seville and Memphis Tennessee.
That proved to be his last race of the season after setbacks had hindered the horse’s preparation for some big autumn targets.
He began 2012, his owner’s Diamond Jubilee year, in the best possible manner when winning the Brigadier Gerard Stakes at Sandown Park and ran an excellent race when beating all bar the mighty So You Think in the Group 1 Prince Of Wales’s Stakes at Royal Ascot.
The way that race was run (Carlton House serving it up to the winner in the home straight, before fading) made connections believe that a drop in trip down to a mile might enhance his prospects.
But, after two disappointing efforts at that distance, including when a distant fourth to Excelebration in the Queen Elizabeth II Stakes sponsored by QIPCO, he was stepped back up to a mile and a quarter for his final outing of 2012, which resulted in a sixth place behind California Memory in the Longines Hong Kong Cup.
Carlton House finished his career in Australia and stands there at stud. His final run was when third in the Group 1 Queen Elizabeth Stakes in 2013.
"Carlton House is such a magnificent and correct individual," said John Warren, the Queen’s racing and bloodstock adviser. "He is by one of the most important stallions in the world. Carlton House proved he was high class from the moment he won his two-year-old maiden at Newbury by nine lengths and he was rated up there with the very best.