[2] Grey Sovereign's dam, Kong, was a sprinter whose victories included the Wokingham Stakes at Royal Ascot.
George Colling, who had trained Nimbus, was interested in the colt but was deterred from buying him by his fractious behaviour in the sales ring.
[5] He recorded his most important success as a two-year-old when he won the Richmond Stakes over six furlongs at Goodwood Racecourse.
[4] As a four-year-old, Grey Sovereign won the Festival Stakes at Birmingham Racecourse in June, beating Royal Serenade by a head.
[4] At the end of his racing career, Grey Sovereign was retired to stud where he became a very successful breeding stallion.