Nearly three years after Jo Cox MP was brutally murdered, her sister Kim Leadbeater explores whether Britain is now an angrier and more divided country, and asks what can be done to heal divisions, stem aggression and prevent another possible tragedy. Kim returns to her late sister's place of work to meet MPs who receive hundreds of abusive messages every week and fear for their safety, while Countdown and Strictly star Rachel Riley talks about the sexist and anti-Semitic messages she's been sent online.