Alan King's 25/1 shot Avispa was a surprise winner of the concluding Concerto Group Mares' Standard Open National Hunt Flat Race.
With Listed honours up for grabs, a strong field of mares assembled for the two-mile-one-furlong contest, with Avispa a big price having finished well held at Sandown on her latest appearance.
However, she travelled well on the heels of the leaders into the straight and got the better of a thrilling final furlong battle with Lady Buttons and Tara Mist by a head and a length and a quarter respectively.
King said: "I was hoping she'd run well as long as Sandown didn't leave its mark and she worked very well in the week.
"Her work at home has always been really good.
"She jumps fine, but she certainly wants a holiday now. She's a bit light."