Observations on the European Racing Scene turns the spotlight on the best European races of the day, highlighting well-pedigreed horses early in their careers, horses of note returning to action and young runners that achieved notable results in the sales ring. Thursday's Observations features full-sisters to Group 1 winners. 1.20 Newmarket, Mdn, £25,000, 2yo, f, 6fT INVIGILATE (GB) (Acclamation {GB}) is a notable debutante to open Newmarket's July Festival as a full-sister to Juddmonte's GI Breeders' Cup Mile hero Expert Eye (GB). Trained like that past luminary by Sir Michael...