in 1837 the marriage forms changed due to 1837 Civil registration.
In 1850 it became possible for couples to marry in the registry office.
There are many repositories that give access to the original record of marriages after 1850 that were celebrated in churches.
Do you know if any of the marriages that were conducted in the registry office, and that would have used the same certificate, are available on line? I know it is possible to purchase copies, but seeing as I am a subscriber to FindMyPast, and a dedicated user of Family Search, I want to explore other options first.
Also whilst thinking about this, is there any way to tell from any index of marriages if a post 1850 marriage was in the Office, or in a church?