If there's one thing Sarah-Jane Clarke and Heidi Middleton know how to do, it's how to ramp up the cool factor. With their label, sass & bide, taking London Fashion Week by storm on Friday night (Olivia Palermo was just one of the fashion-plates in the front row), we were catapulted into a world of tough, industrial shapes and structured lines. But it was the sexy cut-outs and sheer inlays that really stepped things up — the collection was edgy and modern, with a bit of romance and sensuality thrown into the mix. With luxe leathers, heavy metal, pops of yellow and a moody palette of grey, black and ivory, it was a dark and dangerous walk down the runway — and we couldn't get enough of it. Click through now to check out the whole collection!