Congratulations. We did the same after 7 years together, although we didn't tell anyone at all - we asked a couple of passers by to be our witnesses. We showed them our passports to prove we were who we said we were and afterwards gave them a tenner for a drink to say thank you for their time. They were a lovely young couple, students I think, who seemed chuffed to be asked. 22 years later we are still together and many of our friends who had big weddings have gone their separate ways, so from experience I can echo what others have said. Wishing you a happy long marriage. x