This might be a question that someone reading this might think of.
"Why not check the banks archives? Surely they have some info."
Well...yes and no. There is an archive (in fact they gave me the original lists of names), BUT...all staff records are kept locked to the public for 100 years due to sensitive information.
I'm reluctant to query this and try and get access as they've been very patient and helpful with me so far and I don't want to overdo the amount of pestering done.
I do know that they can give me information: they told me the years of employment for a man who died in WW2 who had worked for the Union Bank but wasn't on the plaque (left the banks employment before commencement of hostilities, so that explained that) but I don;t think they'd appreciate me emailing them a big list of names and saying "find them for me".
However, I do need to make enquiries with them in case there were staff magazines or some such information which is a little more freely available.