I think it would be post 1812 - this from Wikipedia:
In 1812 an "Act for the better regulating and preserving Parish and other Registers of Birth, Baptisms, Marriages, and Burials, in England" (Rose's Act [1][2]) was passed. It stated that "amending the Manner and Form of keeping and of preserving Registers of Baptisms, Marriages, and Burials of His Majesty's Subjects in the several Parishes and Places in England, will greatly facilitate the Proof of Pedigrees of Persons claiming to be entitled to Real or Personal Estates, and otherwise of great public Benefit and Advantage". Separate, printed registers were to be supplied by the King's Printer, and used for baptisms, marriages and burials. These are more or less unchanged to this day.