Hello Kanscar,
As you probably already know, there are MICs for three William C Rodways.
Driver AHT/942, Army Service Corps looks like an old hand.
Pte 51574 Gloucester Reg. then 43301 Worcester Reg. I haven't gone into yet.
Pte 36160 Wiltshire Reg. looks interesting, given the Swindon connection.
Looking at casualties with similar numbers (360**, 361** and 362**), they are virtually all 1st and 2nd Battalion, plus a few in 6th Battalion and appear to be late drafts, as the earliest casualty is April 1918. Despite the late date, a lot of them are from the South West.
If this one is your great-uncle it means that he did not serve until after his marriage. Does this fit in with the births of any children?
Phil