Jesus, what a shocker Susannah's face is in that necklace. Even without the necklace it is a horrifying example of age catching up like a stealth bomber. One doesn't often see oneself from this angle and our first piece of advice is to avoid the side mirror view. It's forced Susannah into thinking it might be time for Botox.
The beauty of necklaces is that they need not be heirlooms to lift an outfit from the bottom step of mediocrity to the highest echelons of a Best Dresser. Look at Audrey Hepburn in Breakfast at Tiffany's or Jackie O in The White House; they both understood the power of a plain dress teamed with a fabulous necklace.
Susannah's short neck should not be encased in a dog collar-style necklace, nor should non-matching earrings be competing with the necklace.
Susannah and Trinny in necklaces that are perfect for their body shape and size.