Wedding Vows

Unfortunately, you can only write your own vows in the UK if you are having a non-legal ceremony, as well as a legal ceremony. Some churches let you, but we're marrying at a register office, so we only have a choice of three vow types, which are more or less the same, just differing lengths - we went for the longest. Although I don't have the exact wording to hand right now, it's more or less:

"I do solemnly declare that I know not of any lawful impediment, why I _______ may not be joined in matrimony to _______.

I call upon these persons here present to witness that I _______ do take thee _______ to be my lawful wedded husband/wife."