A shot in the dark - BUT
If this is your Doris Eckershall -( the only one I could find ) - could Thelma have been buried in her mums hometown church ? St John the Evangelist in Hurst
Baptism: 7 Dec 1898 St John the Evangelist, Hurst, Lancashire, England
Doris Eckersall - [Child] of Jonas Eckersall & Mary
Born: 1 Nov 1898
Abode: 45 Queen St., Hurst
Occupation: Butcher
did Doris and Harry have any more children ?
added
if it is your Doris - here is a brother
Baptism: 2 Jan 1901 St John the Evangelist, Hurst, Lancashire, England
James William Eckersall - [Child] of Jonas Eckersall & Mary
Born: 23 Oct 1900
Abode: 59 Queen St., Hurst
Occupation: Butcher
moved from 45 to 59 Queen St