INTERNATIONAL DIAMOND JUBILEE STAKES IS FINAL DAY HIGHLIGHT

Sprinters trained in six different countries are among the 18 declared runners in tomorrow's feature £500,000 Group One Diamond Jubilee Stakes, part of both the Global Sprint Challenge and British Champions Series.

Last year's race was won by the brilliant Australian mare Black Caviar and Sea Siren, based at Randwick with John O'Shea, will bid to emulate her compatriot. The five-year-old, a daughter of top Australian sire Fastnet Rock, was bought by the Coolmore partners in May and will be covered by Galileo. She is a three-time Group One winner over six and seven furlongs and most recently finished second at Doomben on May 25.

There was an American-trained winner on Thursday when No Nay Never captured the Norfolk Stakes and Havelock will bid to take another prize across the Atlantic. The six-year-old, trained by Darrin Miller, has scored on synthetics and turf at distances between five and eight furlongs.

Krypton Factor, saddled by Bahrain-based Fawzi Nass, finished a close sixth to Black Caviar last year and he is having his first start since finishing third in the Group One Dubai Golden Shaheen on March 30.

French handler Alex Pantall sent out Restiadargent to finish third in last year's race and he is represented by Gammarth, a Listed winner in April.

There are five Irish-based contenders including the last season's Prix de la Foret winner Gordon Lord Byron, trained by Tom Hogan for a partnership including top Indian breeder Cyrus Poonawalla. Last year's Wokingham Handicap winner Dandy Boy represents handler David Marnane. Aidan O'Brien saddled Starspangledbanner to win in 2010 and he is represented by Reply while David Nagle's stable star Maarek returns to Ascot having won last season's Group Two QIPCO British Champions' Sprint in October. Trainer Edward Lynam won Tuesday's King's Stand Stakes with Sole Power and he will bid for another big success with Slade Power.

Society Rock, successful in 2011, bids to become the first dual winner since Right Boy in 1958 and 1959. He won the Group Two Duke Of York Stakes at York last month on his seasonal return and Lethal Force, who was beaten a head that day, reopposes.

There are two three-year-olds in the line up - last season's Cheveley Park Stakes heroine Rosdhu Queen and Zanetto, a Listed winner at Newbury last month for trainer Andrew Balding.

Roger Charlton, successful in the 2001 renewal with Harmonic Way, runs the filly Mince who won the Group Three John Guest Bengough Stakes at Ascot on October 6. The runner-up in that contest, Godolphin's Soul, a Group Two winner in Australia, lines up again.

Scottish handler Jim Goldie is represented by stable stalwart Hawkeyethenoo, Dean Ivory saddles Sirius Prospect, who finished third in last year's QIPCO British Champions' Sprint Stakes, while the field is completed by Intense Pink, who scored over seven furlongs in Listed company at Ascot in October.