(1)It shall not be a defence to an employer who is sued in respect of personal injuries caused by the negligence of a person employed by him, that that person was at the time the injuries were caused in common employment with the person injured.
(2)Accordingly the [43 & 44 Vict. c. 42.] Employers' Liability Act, 1880, shall cease to have effect, and is hereby repealed.
(3)Any provision contained in a contract of service or apprenticeship, or in an agreement collateral thereto, (including a contract or agreement entered into before the commencement of this Act) shall be void in so far as it would have the effect of excluding or limiting any liability of the employer in respect of personal injuries caused to the person employed or apprenticed by the negligence of persons in common employment with him.