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The UK has become one of the first countries to introduce widespread regulation of online content with the introduction of the Online Safety Act 2023 (OSA).

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Online regulation in the UK

The UK has become one of the first countries to introduce widespread regulation of online content with the introduction of the Online Safety Act 2023 (OSA).

The OSA targets three main categories of harmful content:

  • illegal content 
  • content that is lawful but "harmful to children"
  • fraudulent advertising

The scope of the OSA is broad and applies to a range of services, both large and small, where they are user-to-user (U2U) or search engine services. This includes services that offer online marketplaces, dating apps, online games and forums. The OSA applies to any U2U or search service with links to the UK, which includes services accessed by individuals in the UK but that operate from another jurisdiction. The OSA places additional duties on services that are likely to be accessed by children. Categorised services, which are generally larger services, must also comply with transparency requirements which include publishing details about their OSA compliance in their terms and conditions, as well as reporting directly to Ofcom (the OSA regulator). Some services are also required to pay a fee to Ofcom.

All services in scope of the OSA owe their users a duty of care, and must put in place systems and processes to protect their users. In-scope services must also hold appropriate compliance documentation, pay any fees due to Ofcom, submit any required compliance documentation to Ofcom, and conduct regular reviews of their compliance as advised by Ofcom's guidance.

Ofcom's role is to enforce failures to comply with the OSA and associated regulations and guidance. It may impose financial penalties (including fines of up to £18 million or ten percent of global turnover, whichever is higher), as well as potential criminal sanctions for senior managers.

The OSA aims to dramatically change how we interact on the internet and, it is hoped, afford significantly better protection to victims of online harms. However, despite Ofcom's programme of guidance, questions remain as to how the OSA should operate in practice, its impact on businesses (including new businesses), and the broader implications for privacy rights and freedom of speech. We are monitoring these impacts closely and regularly update our clients on developments.

This page provides links to key documents and commentary on the OSA, as well as broader issues relating to online harms. We also set out the key implementation dates below.

Ofcom codes of practice

In 2025, Ofcom published codes of practice for how in-scope companies can comply with their duties, covering:

Ofcom's key milestones for 2026

June 2026
July 2026
Autumn 2026
October 2026
November 2026
January 2027
2027

February 2026
Ofcom will publish its guidance on super-complaints, following a consultation in September 2025.

April 2026
Ofcom will publish advice on technology notices to the Secretary of State and final guidance to providers of user-to-user services or search providers on requirements to use accredited technology to identify and prevent users from encountering child sexual exploitation and abuse (CSEA) and / or terrorism content on their service.

Spring 2026
Following its consultation in September 2025 on draft recommendations for how online platforms should promote media literacy, Ofcom will review responses and aims to publish its final statement of recommendations in Spring 2026.

June 2026
Finalising additional safety measures on crisis response: In 2025, Ofcom conducted a consultation on additional online protections that tech platforms should implement during a crisis, with the aim of preventing the proliferation of illegal content and harmful content to children during such events. Ofcom will announce its final decision on its proposal on crisis response in June, following the decision to accelerate this workstream. They anticipate that, subject to parliamentary processes and the summer recess, any new Codes of Practice measures will likely come into effect in the early Autumn.

Media literacy statement of recommendations: Ofcom will publish their final statement of recommendations on how online platforms should promote media literacy, following its 2025 consultation on proposed recommendations.

July 2026
Categorisation and additional duties on categorised services: Following a legal challenge against the secondary legislation setting thresholds determining which services are categorised under the OSA, Ofcom will carry out a representations process in early 2026 to give affected services an opportunity to comment on its provisional decisions. Ofcom intends to publish the categorisation register around July 2026, subject to the outcomes of the representations process. This will also include an update on the timeline for transparency reporting (which will commence in 2027).

Age assurance statutory report: Ofcom will publish a report by the end of July 2026 assessing how services have used age assurance and how effective it has been for the purpose of complying with their duties under the OSA.

Autumn 2026
Following its June 2025 consultation on a targeted set of additional safety measures designed to make online services safer, Ofcom intends to publish its findings by autumn 2026. It will provide an update on specific timings for publication once all responses have been reviewed.

October 2026
Ofcom will publish its statutory report into content harmful to children.

November 2026
The Online Information Advisory Committee will publish its first statutory report no later than 1 November 2026.

January 2027
Ofcom will publish a report on the use of app stores by children by January 2027, assessing the role app stores play in children encountering harmful content and evaluate the use and effectiveness of age assurance by app store providers.

2027
All categorised services will be required to publish their first transparency reports in 2027. This will follow the timeline set out alongside the publication of the register of categorised services in July 2026.

Keeping up to date

If you have any questions about how the OSA may affect you or your business, please contact a member of the team or get in touch.

Our multi-disciplinary team includes lawyers and non-lawyers with a range of expertise in digital regulatory compliance, reputation protection and crisis management, data protection, criminal law,  and more. We regularly advise clients with sector-specific needs including those in the interactive entertainment, media and retail sectors.

To receive further updates on the OSA, please sign-up to our Online Safety Act mailing list.

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