I had a registry wedding first, got that dress in House of Frasier on sale for £60. It was not a wedding dress at all but worked well (Except that it was too loose at the top.
I got my other wedding dress in London and took it in my suitcase back to the US when I got married there. (Saw the same dress for a few hundred cheaper in NY, but it was good to know I had the dress, took 2 months to get it)