Only it appears that they are not even doing the training right! You are supposed to get four hours' training on the base set, then another one to two hours on the hand-held radios. So how come some managers feel they can slip this into a TeamTalk session, or give you less than an hour's training at the end of your duty when you've come off your train?!
Tubeworker can do the maths. Six hours training means a whole duty, so no driving on that day. Anyone - whether a driver or any other grade - who feels that their training was not good enough should refuse to sign it off, refuse to use the kit and demand proper training with a day off the job to do it.