familysearch.org contains the IGI, International Genealogical Index, this index has been compiled by the LDS Church to enable Church members to identify their ancestors and then postumously baptise them into the Church congregation. To do this the Church bought the filmed Parish Registers om Baptism and Marriages from the Churches all over the world. They then made their own transcription from the mictofilmed registers and created an alphabetical index by Country, County, Surname and then Christian name and then chrinologically by the christian name under eas=ch surname. The online version =gives you that record one christian name within a surname at a time and in order of county and within county chronologically.
As baptism records were only begun in 1538, as long as the Parish Church was around then, and as long as the original regsiter survived, and as long as the Bishop of the Diocese gave permission for the Mormons to have the register filmed, you should find the baptisms and marriages on the IGI,. from 1598, the registers were copied every quarter at the Bishop's Visitation to the parish and these Bishops Transcripts, being a hand copied copy of the original, were deposited with the Chruch Archive, which is usually the County record Office in England and Wales.
This means that on the IGI you are perthaps reading a printed transcript, of a name read on a roll of film, looked at on a reader, by someone who is unfamiliar with English surnames, who inputs the name into another computer. bearing in mind that the person who hand copied the names from the original register from 1598 onwards may well have been more familiar with the local names, this is the record to trust more than one transcribed in more recent times. BTs can be searched on film at your relevent CRO.