Of course, there are sunglasses and there are sunglasses, and this summer it's the Jackie O look which has swept all other contenders away. You don't want to be messing around with Seventies Aviators (too clichéd rock star) or wraparound Oakleys (too royal family) - if your shades are not fantastically, gigantically vast, then, quite frankly, they are wrong. Aim for a pair with lenses the size of dinner plates and you're almost there.