I have used this site before and was very pleased with the service. There are some great bargains on there anyway but they now have 25% off selected dresses too.
My mum just showed me a dress which she was about to order from her catalogue for my brothers wedding which was £170.00 and I just found the exact one (from the current catalogue) for £33 plus £4 p&p on this site. It was the same picture etc. This site sells stuff from all the big home shopping catalogues such as Grattan and Freemans and they sell shoes, clothes, homewares etc.