Alfred Bowley must be related to the other Bowleys on your Roll was born Nanpantan but resided Shepshed he died of wounds 25/3/18 but isnt comemorated on the Nanpantan one.
A Bowley, 45989 private in the Leicesters, from CWGC site, gives parents James and Mary. Which would agree with the parents of the Bowley family on the Roll but does not give a forename. There is a sibling Alfred. Will do some more digging to see if there is proof, to add as a footnote.
Edwin Angrave is on St.Pauls Woodhouse Eaves war memorial
John A Simmons, is a different person to John Adri Simmons. There are 2 John Arthur Simmons born within 6 months of each other, who may fit the identity. One residing in central Loughborough and one in Shepshed (which you have identified). Both are equi-distant from Nanpantan so could be either or neither!
Spark