Ancestry.co.uk now has 7,549,376 records in the London, England, Marriages and Banns, 1754-1921 database. These are from Church of England Parish Registers at the London Metropolitan Archives.
It's one of the larger London databases exceeded only by:
- London, England, Electoral Registers, 1832-1965 with 159,232,274 records
- London, England, Land Tax Records, 1692-1932 with 12,772,852 records
- London, England, Baptisms, Marriages and Burials, 1538-1812 with 8,841,248 records