I know Margaret went on to marry a Carl Colson from USA a Pilot in 1948 I have the marriage cert for them but No father added for Margaret just a strike,
If she married as Milroy, that probably means that she didn't marry Alan Neill, otherwise she would have been down as Margaret Neill formerly Milroy. What status does it give - single or widowed?
What is a bit odd though is the baby was given her father's surname and his name, occupation and address are on the certificate. As I understand it, unless the parents were married, from 1875 the reputed father had to be present at the registration to consent to his name being added. Maybe this lapsed during the war? Margaret seems very definite about the father's information, even giving his service number.