I can see you have been looking for him for a long time. He does show up on various shipping manifests as going back to the UK over the years, if you are interested in tracking his travels. Did he first go there in 1924?
I see that he was an engineer and so I wanted to suggest to you that possibly he was a member of an engineering association in the UK and that they might possibly have the information you are seeking about him. I know that my father, who was an engineer, maintained his professional membership no matter where he was living. Do you know what kind of engineer he was - civil, mechanical?
You might find some helpful information at http://www.theiet.org/resources/library/archives/research/gu...
Finally, while you are looking for more current records, FamilySearch does have some useful information about Argentinian records on its wiki - see https://www.familysearch.org/learn/wiki/en/Argentina