On the launch night I walked round with a British Shopping Passport which detailed the discounts being given out on the evening.
The launch night was a warm one, and I hate queuing for sweaty changing rooms only to find the outfit doesn't suit me anyway. I took the opportunity to try dresses on in the comfort of my own clothes with the Magic Mirror interactive screen outside Selfridges. You lift your arms to activate the screen, then you scroll through a number of dresses, changing the size and the position on the screen to suit. It's no replacement for actually having the clothes on your body but it's a fun gimmick, and seeing the colours and patterns near your skin are of course a benefit.