Maybe I'm retarded, but I just discovered this line called Sophomore, and I heart it. Its not totally outrageously priced (think $150 for a dress, $50 for a tank), and so now.
I also totally love this piece by Miss Selfridge, I saw it on Rumi here. Unzipped, its a big tee, zipped up, its a mini dress. And its only 20 pounds! (like $40 US).