Utter nonsense, be interested to see if anyone ever needs one for self rescue. Grips my ****. Macdonalds have extinguishers available in their stores, they don’t insist you do a training course before buying a burger. The rule is simple, follow the pictograms and use, if you don’t have time to interpret the pictures then leave and go to an assembly point…Europe
We have since had at least one truck fire resulting in a total loss of tractor unit and trailer.