My 2x great grandmother, Maria Louisa Doyle, was born in Birmingham, Warwickshire, England. Her father was Irish, but her mother’s family came from Birmingham. For this branch of the family, I use the following collections held on Ancestry.com, (as well as the census records, and the birth, death and marriage indexes):
Although the birth indexes on the GRO (General Register Office) website include the mother’s maiden name, the baptism records include the given names of both parents, as well as where they were living, which helps confirm you have the right person. This is particularly important with a surname like Mills, which is quite common.
The marriages are the original church records, which were created closer to the time of the event than the marriage records at the GRO, and using these saves money, as you don’t need to get a certificate from the GRO.
The burials provide the place the person was living, which also helps to confirm you have the right person.