FOI001126 FOI Registrars

I would like to request under the Freedom of Information Act data I believe to be held by your authority concerning marriages.
In particular, I would like to request information on what documentation prospective couples have to present to prove they are not related.
I would like to know the number of marriages which were blocked or prevented from proceeding because of a lack of this proof.
In addition, I would like to know the number of marriages in your area for the past five years. Can you break down this figure to show marriages between First Cousins?
Could this figure be broken down to include the ethnicity of both parties and their gender.
Also, I would like to know any policy or guidance you may have concerning the marriage of first or second cousins.
I would appreciate it if this information could be supplied in an Excel or CSV format.