I tried on a dress in Next today. The product code is AA/06500. The size 8 was marked down to £22 from about £46/7 but none of the others were and it was in the new workwear section. However the sales assistant told me it is a sale item. She could only check the warehouse that served that particular shop and told me to look online but it's nowhere to be seen, and I called them just and they said they can't check any stock until Monday 
It's a black, v-neck dress with wide straps. The V has a lace insert in it and then it's a shift style over the waist (so hangs and doesn't cinch in). At the bottom there is a peek of either lace of fringe, like you'd see if you were wearing a slip.
It's beautiful and would love it for work. I'd need a size 6. Thanks in advance...