Hi it may have been Ekaterina & Maria (stores in Lamcy, Arabian Centre, Mazaya Centre and a few other places).
At first sight the dresses seem v ornate & arabic but if you look carefully you can find some v nice ones. Apparently, they get them from a website based in China called Light in the Box. That may be the site you were thinking of.
http://www.lightinthebox.com/c/wedding-dresses_1181
no it wasn't that one either - I have searched all the posts but can't find it ;-(
If I remember any others I will post them. Maybe this website will help with local suppliers?
http://brideclubme.com
<em>edited by Yorky on 23/11/2014</em>
I also have one for sale, UK size 14. I can send you photos if you are interested.
Was the website Abela's Bridal Boutique?
http://www.abelasbridalboutique.com/ContactUs.aspx