Despite exhibiting a bit of youthful austerity, the 2015 Diana Madeline should mature into an exemplary representation of Margaret River Cabernet Sauvignon (there's 11% Merlot, 1% Malbec and 1% Cabernet Franc in the blend). It's classic Bordeaux in style, meaning it's medium-bodied and streamlined and framed by firm but ripe tannins. Cassis fruit forms the core, although hints of cedar oak, pressed flowers and dried herbs add considerable nuance, picking up notes of chocolate on the taut, lingering finish. It's an early candidate for Cabernet Sauvignon of the vintage in Margaret River.