The Harper Committee has been charged with ensuring that our competition laws are “fit for purpose”. In its draft report, it has set about this task by (amongst other things) proposing a radical re-write of our misuse of market power prohibition. But will the proposed new law address the shortcomings identified by critics of the current section 46? In this edition of TSoC, we road-test the Harper proposal, trying it out with examples of allegedly anti-competitive conduct said to fall outside the scope of the current law.