UK Online Safety Act: Ofcom Publishes Final Illegal Content Guidance for Platforms

Ofcom has released its final guidance on illegal content duties under the UK Online Safety Act, requiring platforms to assess and mitigate risks of child sexual exploitation and abuse material, including terrorism and fraud-related content. The guidance sets out how services must conduct risk assessments and implement systems to prevent users encountering illegal content, with priority offences including CSEA content, encouragement of self-harm, and fraud. The regulator will begin enforcement in December 2024, with platforms facing substantial fines for non-compliance.

Real-time pattern detection intercepts illegal content flows at the point of contact rather than after distribution. Where regulatory frameworks impose duties to prevent exposure to harmful material, systems that identify coercive escalation, image-based abuse and exploitation in direct messages before they reach a child address the duty at source. Guardii's anti-CSAM and anti-grooming modules flag hostile or exploitative exchanges as they develop across Instagram, Snapchat, Discord and Roblox, surfacing risk to the appropriate authority without requiring platform-wide content scanning or creating a surveillance feed of every user's private communication.