Keyboard86 that looks promising - I couldn't find 1871 - 91 Census.
I have tracked an Ellen Shevatt through the Workhouse 1845, 48, 49, 51, 52, 53, 54, 68 and 71 with daughter Ellen jnr who would appear to be illegitimate.
Also in 1949 I've found William Shevatt aged about 40 with daughters Mary Ann 9, Ellen 8 & Susan 6.
Ellen Shevatt (snr) is living with married daughter Ellen and family 1901 & 1911 census and electoral register through 1920's to her death in 1928.
'Brother' Thomas Murphy is Head of household with them 1911 and for a few later years but then William George Head is heading the household for a few years and the latest year I found it is Percy Johnson.
Could referring to Thomas Murphy as her brother be a lie?
Ellen Shevatt jnr names William Shevatt (dec'd) as her father on her marriage certificate - could she actually have named her Grandfather to cover for her illegitimacy?
Many thanks