We're in the middle of a series seeking to understand the issues and controversy surrounding human sexuality and same-sex marriage going on in Church and culture at the moment.

This week we're asking the question What is marriage?  The Church of England lawyers have been asking how it's permissible for an atheist couple to get married in a church, but not a same-sex Christian couple. We look at the difference between marriage as covenant and marriage as contract and what is said in the marriage preface at a wedding ceremony.