Thanks to John's
PDF which records in words and pictures that Bath College Cadet Corps, later OTC 1908-10, wore the Somerset LI Badge of its local VB unit, I think this is conclusive proof that Rawlin's book has got it wrong and the badge he attributes to Bath OTC is a
Bath Police collar badge. The Bath
Special police cap badge has exactly same design of shield in it.
The unit are recorded as wearing 1 VB badges in 1901 (collars on side cap). They later had CO 1 SLI's permission to wear the SLI Jellabad badge.