www.perditasweddingshoes.co.uk do wide fitting bridal shoes. They have a variety of heel heights and styles, some of which are dyable. They also do Rainbow Club wider fitting shoes. Prices range from £59.99 - £120. I've never used them so can't comment on the service they offer
BHS have some wider fitting styles in their bridal range as do Viva La Diva and Simply Be and Girls of Elegance, again, all do lovely shoes, but can't comment on service.
[This post was edited by Doing-it-Ourselves at . ]