Skirt: TopShop. T.Shirt: StyleStalker. 
Leather Jacket: Balenciaga (alternative here).
Clutch: Alexander McQueen (get the look here).
Shoes: Nicholas Kirkwood.

This is one of the few jersey pencil skirts I've found that actually holds its shape through a full day's wear. Nothing worse then a misshaped pencil skirt! 

Pictures in this post taken by Tolga Safer.