Hi Judith, Many thanks for your speedy reply.
Yes, I've found Edward's grave in Paignton and Letters of Administration, and ive found both Edward and Helena in the 1921 census - in different locations. Strangely, I've found no death or burial for Helena.I've also found no adverts or any other references to Edward or Helena in any newspapers.
I hadn't thought that Edward might have military connections. Something to explore. Thanks again for taking the time to respond, Sue.