The colt appeared to have registered another major success when passing the post clear of a top-class field in the International Stakes but was controversially disqualified for causing interference in the straight.
Persian Heights was a "rangy"[2] chestnut horse with a white sock on his left hind leg[3] bred by the Newmarket-based Banstead Manor Stud.
On his final appearance of the season he was moved up sharply in class for the Group One Middle Park Stakes at Newmarket Racecourse on 3 October and started the 7/2 third favourite in a five-runner field.
[9] After a two-month break, Persian Heights was stepped up in distance and matched against older horses for the first time in the International Stakes over ten and a half furlongs at York Racecourse.
After turning into the straight fifth of the six runners he accelerated into the lead a furlong out and finished first beating Shady Heights and Indian Skimmer by a length and a half and a neck despite hanging to the left in the closing stages.
Indian Skimmer's rider Steve Cauthen lodged an objection to the winner, and the racecourse stewards ruled that Persian Heights had caused interference which prevented the filly from finishing second.
In September he started 2/1 favourite for the Irish Champion Stakes at Phoenix Park Racecourse and finished fourth behind Indian Skimmer, Triptych and Shady Heights, proving the best of the three-year-old entrants.