A quick search of the 1881 & '91 census shows Benjamin Roberts, Snr (1852) & Jnr.(1879) living at Chadwick.
There are possible deaths listed, 1928, aged 77 so poss born abt. 1851
and 1947, aged 69 so poss born abt. 1878
There is also another Benjamin Roberts death in 1920, aged 60 so born abt. 1860, all at Bromsgove.
So, maybe, the Benjamin you seek may not have died during the war, might be a good idea to get death certificates to check details.
Thanks for looking Colin. I do have all the relevant history from the census and the BMD records. I have a subscription to The Genealogist. As I told Polly last night, I am beginning to wonder if this is one of those family tales that gets passed down and corrupted on the way. That is why I was trying to find the relevant War Memorials so that I could prove to Bob (my friend I am helping) one way or another if Benjamin had died in the War.
Again, thanks for your time.
Irene