These jeans from Next - very comfortable, look much better rolled down (but I'm not a cropped jeans kinda gal). Have elasticky side panels and adjustable band thing (like in kids trousers) they look really good and wash well (!)
dress from Peacocks - a steal at £16 - I haven't actually bought this yet, but intend to do so pretty sharpish. Dresses are SO comfortable when pg, especially in later stages. Will look smart for work and can be dressed up with fab accessories for a night out. Cross over norks is flattering and the bit under the norks is good as it is quite fitted.
crop cardigan - looks shite on teh website, but great "on". I wear with non-maternity camisole stretchy tops (am not massively pg yet!) without fastening the cardi. Great little cover up.
\link{http://www.newlook.co.uk/1360827/136082701/ProductDetails.aspx). These are fab. So comfortable and even though they are a linen mix, they aren't a pig to iron - I'm allergic to ironing and took these off the line today and decided I could get away with not ironing them! Like the jeans above, stretch side panels and adjustable strap thing. Nice and snug (but not too snug) around the bum and hips, with pocket detail on the back - don't think it would suit the huge of arse, but average and small bums (sadly I'm the former) are flattered by teh cut. Cheap too. Look good with teh cardi above.