These dresses don’t need an Identity Parade in order for us to be able to tell them apart, so instead we will content ourselves with pointing out that if you fancy wearing a one-shoulder dress in the style of Vera Wang’s gorgeous yellow prom dress (which is now, sadly, out of stock), and you don’t mind sacrificing the "gorgeous yellow" bit, you’d better head over to Oasis, where you’ll find a similar style in black, for just £70. Which is rather less than a Vera Wang…