A visit to the Herefordshire Archives and Records Centre has yielded some fantastic results in the shape of the Absent Voters Lists!
The lists for 1918-1919 confirm that Grandad was indeed conscripted into the 3rd KSLI, that he was posted to the Devonshires at the end of October 1918, and that he was subsequently posted to the 1/5th DCLI after the Armistice - demobbing November 1919.
Grandad's page has been updated as a result.
(Note that, while this latest update answers a lot of questions, I have still detailed the research I carried out beforehand in the hope that it will be of use to other amateur researchers!)
