Black Caviar, the queen of Australian racing, would certainly be the top draw of all, but she could be joined by several of her compatriots.

Ortensia, winner of last weekend's Al Quoz Sprint in Dubai, is bound for Britain along with Foxwedge, who has been beaten by Black Caviar this spring but subsequently took a Group One at Moonee Valley.

Bahrain's Krypton Factor and Singapore star Rocket Man, first and second in the Golden Shaheen, are also in the picture.

Prosser said: "I spoke to Black Caviar's trainer Peter Moody in Hong Kong and the July Cup is on his radar.

"Ortensia is on target along with Foxwedge. Krypton Factor is also on target and Rocket Man is a possibility. I am going to go out to Singapore to see him run in the KrisFlyer, but he could come over."

Prosser is also clerk of the course at Newmarket: "It's good ground at the moment, and there's a really nice racing surface."