On 25 March 2024, the UK Office of Communications (Ofcom) published its research and advice to the Secretary of State (SoS) on the threshold conditions that it considers appropriate to determine whether a service falls into Category 1, 2A or 2B under the Online Safety Act (OSA). Category 1 and 2B apply to user-to-user services, whereas Category 2A applies to search services. This advice forms …