I am in love with the vibrant colour and silky feel of Gilly Hicks Down Undies. This shop is new to the UK and is part of the Abercrombie & Fitch family. They sell these beauties as well as swimwear and jammies.
I discovered it when I went for a wander in the Hollister on Regents Street and basically spent half an hour standing there picking and choosing my favourites.
Even more tempting is the fact that they are currently having a promotion where you can buy 5 for £20. I'm going to make sure to grab myself some more soon.