Thanks to you all for the replies.
I should perhaps point out that the image in the first reply of this thread (from me) is clickable if you want to see the MIC in detail.
Maybe the MIC was issued just to contain the SWB, but other sources indicate that a different form was normally used.
http://www.1914-1918.net/mics.htmSurely the fact that none of the "standard" medals were awarded means he never went overseas?
Verbal family history has it that he was either executed or imprisoned for going AWOL. He married in June 1915, on license, and the story goes that he went AWOL the following year to see his son. However, as the MIC/SWB was issued, it seems unlikely to me that he was executed. There's not a lot more I can add, other than it is known his wife brought up her son alone. So maybe he was killed, or just deserted her.
Dave