My Whistles black jersey tube skirt is proving to be a good buy. I have adapted my summer '10 item wardrobe' slightly (have neither the time nor the energy to do a full conversion for autumn at the moment!) simply by adding opaque tights and different shoes/ boots.
I was unsure whether the white jacket would work on a dull day - but think it did.
Jacket - Tesco
Skirt - Whistles Jersey tube skirt - £45
Shoes - Black patent Chester loafers - Russell & Bromley (had these for a couple of years and still going strong - have really been worth the investment)
Tights - M&S Autograph velvet touch opaque (great alternative to Wolford and Falke and the pricier brands)
Top - H&M short sleeved breton
Scarf - White Company (last year) - similar here