Oh, and to expand on John's point about being on an electoral role, women over 30 who also met a property qualification gained the right to vote in parliamentary elections in 1918, but a few women had the right to vote in municipal elections prior to that. That is why you start to see a few women as poor law guardians from the 1880s and later as members of school boards. Under the Municipal Franchise Act of 1869, single women ratepayers could vote in municipal elections and this was extended to married women in 1894. Of course most women were not ratepayers in their own right (their husbands/fathers etc. were classed as the ratepayers) but you will still see some women on electoral registers prior to 1918.
But your relative is extremely unlikely to have qualified.