Aidan O'Brien's strapping filly allayed concerns about her ability to handle lively conditions underfoot with a most authoritative success.

French raider Mandesha was runner-up, while Vodafone Oaks heroine Light Shift was third.

O'Brien's charge always travelled well in the hands of Johnny Murtagh and quickened up nicely to score by a length and a half.

As expected, last year's 1000 Guineas heroine Speciosa endeavoured to make all the running. But Pam Sly's four-year-old was no match for Peeping Fawn once her partner pressed the button five out.

The response was emphatic as the Pretty Polly and Irish Oaks winner, the 2-1 favourite, put daylight between her rivals within a heartbeat.

Three-time Group One winner Mandesha, ridden by Christophe Soumillon, returned to her best with a staying-on second.

Earlier, Sanbuch staged a superb recovery under Jamie Spencer to win the Bluesquare. com Stakes ahead of Coeur De Lionne.