The Church of England
Two Church of England sites have useful 
information.
The first is a site which gives practical information about weddings in the Church of England and answers all sorts of questions that couples might ask.
http://www.cofe.anglican.org/lifeevents/weddings
The second has discussion on a number of issues, such as civil partnerships, cohabitation, divorce, marriage after divorce, family life, human sexuality and marriage, interfaith marriage, and wedding shows.
http://www.cofe.anglican.org/info/socialpublic/marriagefamily