Hi both, and welcome to RootsChat Wendy

Looks like he was in the Army. He joined The Yorkshire Regt (Regimental Number 6448) at Pontypridd in January 1901 (and deserted in September, apparently)
Interestingly, his next of kin is not his wife but his sister Elizabeth, living in Kent, and the particulars to marriage and children are left blank.
Age 19, born Leeds, height 5'6", complexion fresh, hair brown, eyes blue, trade haulier, numerous tattoos
Oh wait - the age isn't quite correct, is it? Could it be a different Thomas, I wonder? I can't see any other Thomas Grinter born Leeds ca. 1880 