There is a distinct difference from being employed as a pilot but differently being employed in a non piloting role but piloting (chauffeuring) the employer as and when required. There are probably hundreds of PPL's operating in this way quite legally throughout this country and worldwide. An aircraft flying on behalf of the company that owns or operates the aircraft is not flying commercially, it is a private flight. The pilots licence therefore need only be a Private Pilots Licence.
Please everyone don't make up your own rules, the state needs no help. The 'Salah' case, from what we know of it, has no resemblance.