I'm a uk size 30/32 so know where you're coming from. I bought some very floaty, long tops in 32 and for the button down nightwear for breastfeeding, simply be and simply yours do some nightshirts that button all the way down to the bottom and some pjs. I bought a colossal size 34/36 in those because I'm very big busted and shirts normally pull on me so I wanted the next size up so they weren't pulling across my boobs - thankfully my mother is dab hand on the sewing machine and sewed new elastic into them so the bottoms actually fit now instead of falling down (she also converted all my bras into nursing bras because I couldn't find them in my size - 48k - anywhere in this country or the US!). I've managed to get away with size 32 trousers and in most clothes but I've not actually put any weight on at all throughout my pregnancy (lost 7lb in first term and have just put that back on again, now 36+2) so that has helped. I'm expecting all my clothes to not fit once baby comes out I think bon prix also do some maternity clothes online up to size 30 but quite expensive IMO. Good luck
Bonprix online has some really really cheap maternity clothes up to size 32. I got a dress from them for a tenner. Not much by way of trouser choice, but excellent for jersey dresses, and maternity tops. There are some tops on sale for about a fiver on their site at the moment.
after much deliberatling I ordered some jeans from tall maternity store for my friend Jo tonight who has 36 inch pins! The OWNER even rang me to check the sizing and tell me the order woule be sent out tomorrow morning, how canny is that! I wouldnt expect that from the huge retailers! Will post some feedback when they arrive (jo's feedback) x