The government’s draft Online Safety Bill defines online harms as user generated content or behaviour that is illegal or could cause significant physical or psychological harm to a person.
Reference:
Department for Digital, Culture, Media & Sport. (2021, June 29). Understanding and reporting online harms on your online platform. GOV.UK. https://www.gov.uk/guidance/understanding-and-reporting-online-harms-on-your-online-platform#what-are-online-harms