Following Hardwicke's Marriage Act of 1754, all marriages (except for Quakers and Jews) had to take place in a Church of England parish church. But baptisms and burials took place in their own churches and chapels, and were recorded in their own registers.
Registers of baptisms, marriages and burials of nonconformist churches were collected by the British government in 1837 and may be viewed at the Public Record Office in series RG 4.