I would wonder if Harry Johnson was of romany origin, because of being a horse dealer and the location and being in the Army Veterinary Corps. I guess there were alot of horse dealers that were not romanies.
Charles Gittos of Wolverhampton married Margaret Ethel Williams (born about 1885) of Banbury in 1908 at Banbury.
(Just incase you want to look at them?)
Charles Gittos born (about 1885) was a Carpenter
Industry PT WAY RLY COMP (Railway perhaps??)