Professor Alice Sullivan has warned the University of Bristol and England’s Office for Students that she is prepared to take legal action after a public lecture on sex and gender was disrupted by protesters, the BBC reports. Sullivan—who led a government review into sex and gender data collection—says some attendees stayed away because they felt intimidated and that the university failed to prevent a 'heckler’s veto.' The row tests new free-speech duties placed on UK universities and could prompt regulatory scrutiny of event security, speaker protections, and campus protest protocols.