If she was part of the family that CaroleW has found, it looks to me as if g.g.Jennings, made up the story about being sent to an orphanage after the death of her parents, as she was ashamed of being in a workhouse.
When you say she had a guardian, Meriel Talbot, do you mean she went to live with her? How does that fit in with her being in an orphanage.
On the 1901 census, (ref RG13/Piece 1135/Folio 80/Page/4) there is a Meriel Lucy Talbot, a spinster aged 34, listed as a "Guest" at St Mary's Convent, Wantage. There are no children listed at all, and the youngest penitent is 15 years old and there is no-one called Jennings.
Lizzie
CaroleW - My post got held up by yours and B17_Fan.