Do you mean the beige dress, sleeveless and short with large pockets and large bow on the front (central)? I am looking for it too, it was first broadcast on Thursdays "first look" Hollyoaks on E4 (13/11/08), then channel 4's regular show on Friday (14/11/08). It was just re-shown today (Monday 17th Nov)
If you've seen it or know where to buy it please let me know!