Viewable on-line - no.

Pre 1884 records for the Established Church are viewable in the Parish Registers which have been filmed by the LDS and extracted to the IGI,

Full certificates for 1884-1901 have also been filmed by the LDS (I'm building an index to these records and it is on my web site.)
A few pre 1884 marriages are also on these films.

The official index 1884-1964 has also been filmed by the LDS.