Antitrust infringement cases in the United Kingdom can run on for years, but there’s a question whether issuing fines that are dwarfed by the revenues of those organisations involved is a worthy deterrent—particularly if they are imposed over a decade after the misconduct ended. It’s also debatable whether the first company to admit that it has been part of a cartel for years should get away scot-free if it agrees to turn over all the dirt on the other members.

Neil Hodge is a freelance business journalist and photographer based in Nottingham, United Kingdom. He writes on insurance and risk management, corporate governance, internal audit, compliance, and legal...