It loks to me as though she may be the Dora who married John Albert Denmark, later dying in Bournemouth as Dora Denmark in 1961 aged 54.
It also looks to me as though her mother may have been Caroline Amelia Andrews b 1877, sister of George John Andrews of Lambeth, who may have taken the surname North without marrying Mr North. A Caroline North is listed with the Denmarks, in Mitcham, in Surrey electoral rolls from the 1930s, and there is a death for a Caroline North in Bournemouth in 1960, aged 83. (John Albert Denmark also died in Bournemouth, in 1981 aged 77).
Lots of hunches going into this though - looks like one where you definitely need Dora's birth certificate.