I have just done my tacho refresher …The instructor was ex DVSA started of as a red coat ad worked his way up through the system seemed to know his stuff ,He did mention out of scope ,not a thing that I care about as I only calibrate /repair them…And next june the new tacho is out that DVSA can download remotely …I did point out our irish friends have probably already sussed a blocker or a way to send a I’m legal signal lol…Lets say he laughed and didn’t disagree …When approved we will need to get new equiptment for calibrating them including a tool that can check it can be checked by DVSA remotely but I digress
From what he said about Out of Scope …If you are in a quarry all day ie off road then Out of Scope is ok …But if you then go on the main road you come under regs ,if you then go back in the quarry you are still under regs and can not go back to Out of Scope…So in a days work according to him you cant go out of scope to normal driving on the highway then back to out of scope