Your M10 forms are the ones you need to complete and return along with the fee to the registar's office (it has to be the one in the district you are getting married in). You can download the forms and print them off and if my memory is correct I think they need to be submitted at least a month before your wedding. I completed ours and sent them in along with the required documents via post as I was told that you don't need to attend unless you want to pay the fee in cash. I put a letter in with my forms asking the registrar to call me to take payment by card over the phone and when she called she asked a few questions about the information on the forms. She also said the celebrant would contact me about 4 weeks beforehand to go over the details of the ceremony. Hope this helps.

The m10 forms can be completed from 12 weeks before until 29 days before, think they cost £70 and you both need to submit the forms, the registrar is marrying us and we need to give names and addresses of witnesses too (separate form).