Someone just as clever as you already thought of it - section (b):that will not work well for anything that uses a PTO to deliver like bin wagons, car transporters, hiabs, lowloaders etc
2) The provisions of paragraph (1) do not apply—
(b)in such a position and condition as not to be likely to endanger any person or property and engaged in an operation which requires its engine to be used to—
(i)drive machinery forming part of, or mounted on, the vehicle and used for purposes other than driving the vehicle; or
(ii)maintain the electrical power of the batteries of the vehicle at a level required for driving that machinery or apparatus.
