New powers granted to the U.K.’s main competition watchdog will result in greater scrutiny, tougher enforcement, and a stark warning for companies to review their sales and marketing promotions—especially since some practices have been pushed firmly into the spotlight thanks to legislation that came into effect last year. 

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...