 The opposite of a "contract of service" is a "contract for services", and it is meant to draw the line between someone who is working for another, on their account, under their control and someone who is working on their own account, controlling their own work.In other words, it is meant to be the difference between the truly "employed" and the "self employed".In many cases, low paid, vulnerable workers, especially agency workers have been held to fall outside the scope of those rights in the Act which are only for "employees".