Europe’s competition chief has once again warned Big Tech firms will be under greater scrutiny over how their services may curb competition—as well as exploit citizens’ data—to help them cement their dominant positions.

The European Commission has also warned it will seek “more imaginative solutions” to ensure fair markets, including using measures aimed at forcing abusive companies to “recreate” competitive markets.

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...