Currently the Driver Radop trade is rated as B3, B2, & B1 each course is run at Grantham depot for two weeks. I believe there was a plan to group all specialist Driver Radops and loan them out to the Specialist Regiments. Independent units also use the Grantham courses.
I believe that some trades are interchangeable such as the Driver Linesman trade as much of it is the same syllabus. Im currently looking deeper into this as a local Signal unit is moving locations and will be displacing some of this trade group in my location.