Yes, you are right about every little piece of information being important, so it's the marriage certificate next. I did wonder if there was any way I could find out which regiment etc. he was in, there are quite a few records of Canadian soldiers in England, and there might be some personal details on that. (next of kin, home addresses etc.). But I shall start with the marriage certificate and see where that leads me.
Many thanks for your help.
Honeybun