Were talking "Road" users with the new driving license that have Photographs of the licensed driver on them. If your scissor lift has a Q plate then your not allowed to drive it off premises like a public road if you do not have the right category on your driving license.
Even if YOU can not drive, you should be passing this information on to ANYONE who does and that they should do same, pass on this information because the quicker this happens and the more people know it is going to happen then it is less likely that someone is going to find themselves fines, car less and having points added to their license all for the sake of a license that expires early.
The "I didn't know" defense will not help anyone who falls foul of this legislation.