Could this be the family in the 1901 census?
It’s the only Elworthy/Elsworthy widow with a child called Winifred.
Address: 70, St Pauls Road, Portsmouth, Hampshire
ELWORTHY, Alice B; Head; Widow; age 26 Occupation: Fried Fish Business; Born: Wales,Canton (Glamorganshire).
ELWORTHY, Winnifred M; Daughter; Single; age 2; born Hants (Hampshire), Portsmouth.
ELWORTHY, Henry H; Son; Single; age 1; born Hants (Hampshire), Portsmouth.
Ref Piece: 20 Folio:123 Page:1004
Registration District:Portsmouth; Civil Parish:Portsmouth
This could be the marriage
Elworthy, Hubert Henry; Jun Qtr 1897; District Portsea Island; Vol 2b; page 897
THOMAS, Alice Beatrice; Jun Qtr 1897; District Portsea Island; Vol 2b; page 897
Elworthy, Winifred May; Sept Qtr 1898; District Portsea Island; Vol 2b; page 471
Elworthy, Henry Hubert; Dec Qtr 1899; District Portsea Island; Vol 2b; page 505
You can obtain copies of the certificates via the GRO link in my previous message.
Only other records I can think of and it will be long shot as I’m not sure if the dates given for the records (Apr 1901- March 1960) relate to payments or dates of deaths.
There’s a set of records at the National Army Museum called “records of soldiers' effects” aka “soldier’s effects ledgers”, that contain details of payments of outstanding pay and allowances to Next of Kin.
See section 8 of http://www.nationalarchives.gov.uk/records/research-guides/b...
and also click on the text link “Section 10” within that.