T Powell 7102 was a Royal Engineer. While it is possible for another man to have the same number (numbers were not unique then), it is too much of a coincidence for both name and number to be the same.
Only a medal record exists for T Powell 7102, no identifying pesonal info. Possible of course that the man served in the Monmouthshires before transferring to RE, but his Mon number would have been different.
As CaroleW has pointed out, there are 5 or 6 T Powells in the Monmouthshire medal records only one has identifying info, he came from Newbridge.
MaxD