If you are still in the area, it looks like Ilkeston Library has a useful local studies section including some newspapers for the period:
https://www.derbyshire.gov.uk/leisure/local-studies/local-studies-libraries/local-libraries/ilkeston/local-studies-at-ilkeston-library.aspxA lot could have happened between 1939 register and the end of WWII, it's hard to say. Injury, sickness, her father being away at war and her mother having not enough financial support, etc.
While Ilkeston itself was not a major target of the Blitz, there was a bombing of some houses during an attack on Stanton Ironworks.
https://www.ilkestonhistory.org.uk/2024/03/01/wartime-childhood-memories/Based on birthdate, these records are probably for her father. A bit unusual of a move to go into merchant marine from Ilkeston I would think, but it's possible he had some technical skills (from working in the ironworks or other local industries) that he was recruited on, rather than as a sailor.
https://discovery.nationalarchives.gov.uk/details/r/C9631256https://discovery.nationalarchives.gov.uk/details/r/D4318315There are some later children in Basford district who I wasn't sure are theirs or not because in 1946 another Moorley/Walker couple marry in Basford
Doris Moorley, born 1942, died 1943.
A girl born 1947, in Basford district (probably the daughter of the 1946 marriage)
There is also a child born 1940, Moorley mother's maiden name Pritchard, who might be part of the family.
I think Thomas's family are the couple Moorley/Glenn (there are two Thomas Henrys of a very similar age!)
They are indexed as "Moodey" in 1921.
He had siblings, but only one appears to have left descendants, so if you do DNA you might find "Hollands" but not Moorleys.
Annie May, born 1910, married a Holland and had four children, of whom three survived to marry.
George William, born 1914 died 1929
Frederick Arthur, born 1917 and died 1946
