Are you sure she was a baby? did your gramdnother emigrate from Wales or remain there? Any other hints?

In 1911 Bedwelly Monmouthsire shows a Maud Pickford age 17 in household, however I don't have paid subscription for access to see who she is with birth year.

There is a Doris Ethel born to a Maud Down 1894 in a workhouse in Monmouthshire, found online.