Ah gotcha,pretty much the same as the tacho exemption then..
Sort of.
The tachograph exemptions are more clear cut and easier to argue.... There is overlap, but some things don't. For example a Utilities worker on R&M that drives a lorry occasionally to deliver materials to other gangs wouldn't require a tachograph, but would require a driver CPC..... A Utilities worker on New Projects who had a lorry with tools and equipment for his days work would need a Tacho but not a CPC.
I Don't have a CPC..... Conscious decision and as with anything it's something you have to be prepared for if taken to court. It becomes contentious when you spend a day on a lorry running stuff into a job (Say a trip for the digger, and return to get dumper, then muck away a load offsite and return with stone) DVSA would argue your lorry driving, but the reality is it's ancillary to your job (Driving the digger).
You need to know salt and be prepared to argue in court your exempt.