Illegal and harmful content

OS-illegal

Investigation into the provider of Telegram and its compliance with duties to protect users from illegal content under the Online Safety Act 2023

Published: 21 April 2026

We are investigating whether the provider of Telegram, Telegram Messenger Inc. has failed, or is failing to comply with its illegal content safety duties under the Online Safety Act 2023 in respect of Child Sexual Abuse Material.

Investigation into the provider of Chat-Avenue and its compliance with duties to protect its users from illegal content

Published: 21 April 2026

Ofcom is investigating whether the provider of Chat-Avenue.com (‘Chat-Avenue’) has failed and/or is failing to comply with the duties under the Online Safety Act 2023.

Investigation into the provider of Teen-Chat and its compliance with duties to protect its users from illegal content

Published: 21 April 2026

Ofcom is investigating whether the provider of Teen-Chat.org (‘Teen-Chat’) has failed and/or is failing to comply with the duties under the Online Safety Act 2023.

Ofcom investigates Telegram and teen chat sites

Published: 21 April 2026

Ofcom has launched an investigation into Telegram under the UK’s Online Safety Act, to determine whether it is doing enough to prevent child sexual abuse material being shared.

Investigation into the provider of Yolobit and its compliance with duties to protect its users from illegal content

Published: 10 June 2025

Last updated: 21 April 2026

We are investigating whether the provider of Yolobit has failed/is failing to comply with its duties under the Online Safety Act 2023.

Enforcement programme into measures being taken by file-sharing and file-storage services to prevent users from encountering or sharing child sexual abuse material (CSAM)

Published: 17 March 2025

Last updated: 21 April 2026

Ofcom has opened a programme of work, or ‘enforcement programme’, to assess the measures being taken by providers of file-sharing and file-storage services that present particular risks of harm to UK users from image-based CSAM to ensure users do not encounter, and offenders are not able to disseminate, such content on their services.

Investigation into 4chan and its compliance with duties to protect its users from illegal content

Published: 10 June 2025

Last updated: 21 April 2026

We are initiating an investigation to determine whether the online discussion board 4chan has failed—or is currently failing—to comply with its obligations under the Online Safety Act 2023.

Online safety fees: what the duties are and how to comply with them

Published: 21 November 2025

Last updated: 20 April 2026

Find out about the new fees-related duties imposed on certain providers of regulated services under the Online Safety Act and how to comply with them.

How Ofcom is helping children to be safer online – a guide for parents

Published: 24 April 2025

Last updated: 20 April 2026

Children in the UK will be able to live a safer life online under new Ofcom protections which set ambitious new safety standards for tech firms. As the UK’s online safety regulator, protecting children is a priority for Ofcom. We’re determined to make the online world a better place for them – and to give parents peace of mind that their children will be better protected from the risks they might face.

Transparency: public stakeholder engagement notice

Published: 15 April 2026

We are requesting views from civil society organisations and the public on the information they want service providers to publish.