im too inthe same boat,im 6 months now and to be honest im not the samllest of people and i can get away with dresses from most shops such as newlook,next etc go for the floaty style,they are all in at the mo.they are alot cheapper too,i just  got one from  matalan nice cream broidered one its perfect.  good luck.cos i know how you feel xxx

Isabella Oliver has some beautiful dresses in at the moment :

http://www.isabellaoliver.com/maternity-clothes

I've brought quite a lot of pieces from there in the past and the quality is fantastic.

Hi there. I know you are not keen to shop online but my friend has just bought a stunning GAP maternity dress from Mummymaternity.co.uk. Was new and tagged at the fraction of the retail cost - also a bonus as GAP stuff is not available over here

Hi there next sells a black dress which is only about £40. but i got a lovely dress from issabella oliver they do a number of dress and i brought a rasberry empire wrap dress i felt really sexy init and i paid £95 wore it twice and sold it on ebay for £56 so in fact it only cost me £40. There are other websites but i loved issabella the best

PS thats the dress i'm wearing in my picture

grainne