My fiancée and I are booked to marry early November. When we gave notice back in June and we gave the town that we met in as the place that we'll marry.
We would both like to essentially just sign the paperwork with two witnesses. Neither of us are bothered with the 'legal' marriage, as we plan on holding a church wedding ceremony (we're both Christians and the oath under God is what is important to us) with many guests after our baby is born and settled. Owing to circumstances, it's important that we are married legally ASAP.
We found out that the town we chose when we gave notice only offers the full registry office ceremony, not the sign-and-go option. There are other registry offices in our county that do, however that would require giving notice again, which is something we cannot do.
I paid the full price for the ceremony, and have been sent an e-mail with a planning sheet. It asks what vows we would like to use, the flower arrangement, photographer, music... things we are simply not interested in.
My question is, before I make myself sound like a berk on the phone, do you think it'll be acceptable for me to phone them, tell them that we don't require any of this and just want to sign the paperwork?
We are down to have a half hour meeting with them before the ceremony, then the half hour ceremony itself. It's the last one of the day, I was thinking of pitching it to them that we could be in and out and they could finish early... on me 
What do you think?