Not all burial records
Currently the findmypast.com offering includes millions of burials from those collected by the Federation of Family History Societies (who I'm associated with) as part of the National Burial Index project which is work in progress. The greatest concentration of these is in the period 1812-1837. Not all family history societies contribute to the project, some parish registers haven't survived, some are unreadable so this volunteer effort can never be complete.
Biting the hand that feeds IT
