A few days ago I found this knitted tunic in H&M for £24.99, (you can get 20% off a purchase if you sign up for their newsletter). What I love most about it is it's versatility. You could wear it with a grey/black/green hijab and grey/black trousers, as well as jeans - me thinks this will fast become my Autumn favourite. It's also strangely reminiscent of this hijab-friendly Ralph Lauren coat from Fall 2008 RTW:
It looks a little fitted in this picture, but if you size up it's a nice loose fit, and hits just above the knee. H&M also happened to have a green crinkle shayla that would match perfectly (and doesn't need any ironing, yay!) for £5.99, but I couldn't find a pic unfortunately.
Green hijab £7.95, The Hijab Shop; black long sleeve top £7, Dorothy Perkins; knot and eyelet ballerina £25, Barratts; wire wrapped cuff £9, Accessorize; black ring slouch bag £25; Dorothy Perkins; jeans £65, French Connection.