Just looked at GRO Services (something you would learn on the Orphan Trail) for Ella Dorothy. It says her mother's maiden name is CRESSWELL.
Therefore you can look at FreeBMD for a GEORGE marrying a CRESSWELL around about the time of Ella's birth:
Edit: Edward GEORGE mar Eliza CRESSWELL:
England & Wales marriage registration: Pershore [district], Volume 6c, Page 452A, June quarter 1887